The Center for Reproductive Endocrinology and Fertility, is a company that works within the Biotech/healthcare. This Spokane, WA-based business. Their profile on Lead411 presents significant contact information such as cfo contacts, phone numbers, linkedin data, and The Center for Reproductive Endocrinology and Fertility email format addresses with the @fertilitydoctor.net domain as well as quality contact info regarding The Center for Reproductive Endocrinology and Fertilitys CEO . They have their head office in Spokane, WA. If you sign up for our free trial you will see our [email protected] addresses ...
www.MOLUNA.de Reproductive Endocrinology and Infertility [4172281] - Management of the modern reproductive endocrinology and infertility clinic has become very complex. In addition to the medical and scientific aspects, it is crucial that the modern director be aware of of incongruent fields such as marketing, accounting, management, and regulatory issues. Reproductive Endocrinology and Infertility: Integrating Modern Clinical and
Environmental effects on reproduction, and life history General sequence of events during mammalian reproduction, and variations: Delayed fertilization, delayed implantation, and delayed development Environmental
It has been challenging to genetically improve reproduction traits with the resources of the conventional breeding because of the low heritability of these traits. In Finland genetic improvement of the reproduction traits hasnt either meet the expectations entirely. Gene markers are one possibility to make genetic improvement of the reproduction traits more effective. With an association analysis it is possible to find those gene markers which have statistically significant effect on the trait. The purpose of this study was to identify SNP markers associated with reproduction traits in the Finnish Yorkshire pig breed. Other purpose of this study was to find out if both Finnish pig breeds have certain chromosomal regions associated with same reproduction traits. In this study one goal was also to discover genes which are placed near statistically significant SNP markers. Under this study were nine female reproduction traits which are total number of piglets born in first and later parities, ...
Seek specialist in Fertility & Reproductive Endocrinology? Doctors Reviews and Profiles will help you to make the right choice. Articles on Fertility & Reproductive Endocrinology - www.doctorhelps.com
Reproductive Endocrinology RE Definition - Reproductive endocrinology is a sub-specialty of Obstetrics and Gynecology that focuses on treating men and...
Costs of reproduction are the trade-offs that exist between reproductive investment and survival and/or future reproduction [1,2]. In recent years, studies have focused on the ecological and physiological basis of these costs [3,4]. Such costs include increased oxidative stress (e.g. [5]) and metabolism (e.g. [6]), impaired immune function, and decreased growth, energy stores (e.g. [7]) and endurance (e.g. [8]). Reproductive effort can also have intergenerational effects: offspring quality may decrease when reproductive investment increases, owing to a trade-off between offspring number and quality [2]. Experiments have shown the existence of such a trade-off in mammals, reptiles and birds. For example, offspring from enlarged litters [9,10] or miniaturized eggs [11] have been shown to have a lower survival [10,11], be more stressed and have a lower immune performance [9]. Therefore, parental reproductive effort is linked to offspring quality. Moreover, small offspring can show a period of ...
Definition of Proximate Cause in the Legal Dictionary - by Free online English dictionary and encyclopedia. What is Proximate Cause? Meaning of Proximate Cause as a legal term. What does Proximate Cause mean in law?
Fitness trade-offs such as costs of reproduction are an integral component of evolutionary theory, and a common trade-off is that increased reproduction decreases longevity. Our labs interest in reproductive costs stems from its potential to reveal conserved mechanisms that regulate the aging process. When we were in the planning stage of this study, our goal was to explain a recent phenotype we observed where the lifespan of fruit flies was decreased by exposure to pheromones of the opposite sex, and mating actually partially reversed this negative effect. While we were obviously interested in the molecular mechanisms of these phenotypes, we also sought to better understand why this might occur from a conceptual level. Our first thought from this perspective was that the negative effects of pheromones in the absence of mating may be due to a mismatch between expectation and reality. In this line of thought, mating partially rescued the negative effects of pheromones on longevity because the ...
Welcome to USF IVF and Reproductive Endocrinology at the University of South Florida Morsani College of Medicine. Our mission is to lead the way in delivering the very best infertility and reproductive endocrine (REI) care available to our patients.. Through treatments including fertility medicines, intrauterine insemination, IVF, and reproductive surgery, our team of fertility experts is committed to giving our patients the very best opportunity to achieve their dream of having a family. By collaborating with egg donors, sperm banks, and gestational surrogates, we are able to offer family building choices to women whose own eggs cannot produce a baby, to women who cannot carry their own babies, to single parents, and to same sex couples. By incorporating preimplantation genetic diagnosis, PGD, into IVF, we offer couples whose children are at risk of inheriting a genetic disease the ability to test embryos for the presence of the disease of concern. PGD also affords the opportunity for sex ...
TY - JOUR. T1 - Expanding reproductive lifespan. T2 - A cost-effectiveness study on oocyte freezing. AU - Van Loendersloot, L. L.. AU - Moolenaar, L. M.. AU - Mol, B. W.J.. AU - Repping, S.. AU - Van Der Veen, F.. AU - Goddijn, M.. PY - 2011/11. Y1 - 2011/11. N2 - Background The average age of women bearing their first child has increased strongly. This is an important reproductive health problem as fertility declines with increasing female age. Unfortunately, IVF using fresh oocytes cannot compensate for this age-related fertility decline. Oocyte freezing could be a solution. Methods We used the Markov model to estimate the cost-effectiveness of three strategies for 35-year-old women who want to postpone pregnancy till the age of 40: Strategy 1: women undergo three cycles of ovarian hyperstimulation at age 35 for oocyte freezing, then at age 40, use these frozen oocytes for IVF; Strategy 2: women at age 40 attempt to conceive without treatment; and the reference strategy: women at age 40 ...
If you are to pay the Dotnode Project, roughly know clinically-tested to guarantee any ebook immunological aspects of mammalian reproduction. Regulation completely to know out more. Please, speed were mbHealth.
Magee-Womens Hospitals Center for Fertility and Reproductive Endocrinology offers a woman-focused approach, knowledge, and expertise to provide highly personalized reproductive health care, including evaluation, diagnosis, and treatment.
Our second expectation was that the decline in the population growth rate, as observed in wild ungulates, would be caused first by a reduction in foal survival and in reproductive performance and last by the survival of adult females. Foal survival did indeed decline strongly as density increased from 5 to 23 horses km−2. Fecundity was strongly age-structured in these horses, as in wild ungulates, and the fecundity of young females declined at high density (see Duncan 1992), though not significantly in the years up to 1981. The fecundity of young mares in Przewalskis horses (Equus przewalskii) was also density dependent, with a delayed age at first reproduction (Tatin et al. 2009). By contrast with wild herbivores, fecundity in prime-aged Camargue females remained high and quasi-constant at high density. Fecundity is an important criterion for horse breeders in the Camargue (P. Duncan 1979, personal observation), and it is possible that mares of this breed have been selected based on this ...
Our fertility doctors provide a full range of services to diagnose and treat infertility. All our doctors are are all board certified in Reproductive Endocrinology and Infertility and are focused focus solely on understanding and treating infertility conditions.
University of Marylands Division of Reproductive Endocrinology offers a full range of proven successful fertility options for individuals and couples.
Therapeutic agents used in reproductive endocrinology and infertility are in almost all cases either naturally occurring hormones or agonists and antagonists
Dr. Kroener is a Reproductive Endocrinology and Infertility Specialist. She is passionate about womens health and provides comprehensive,
Visit Healthgrades for information on Dr. Sunita Kulshrestha, MD Find Phone & Address information, medical practice history, affiliated hospitals and more.
Carlene W Elsner MD is a Reproductive Endocrinology who practices in Atlanta, GA. Get a full report about this doctors background by clicking here.
Andrew J Levi MD is a Reproductive Endocrinology who practices in Trumbull, CT. Get a full report about this doctors background by clicking here.
Reproductive Endocrinology for the MRCOG and Beyond by Adam Balen, 9781904752196, available at Book Depository with free delivery worldwide.
Critical body residues (CBRs) are the measured tissue toxicant concentrations yielding a median dose-response on a dry-weight or lipid-normalized basis. They facilitate management decisions for species protection using tissue analysis. Population CBR is the mean dose yielding 50% population suppression and was predicted here in Amphiascus tenuiremis for fipronil sulfide (FS) using lifetables and the Leslie matrix. Microplate bioassays (ASTM E-2317-14) produced biomass sufficient for dry mass and lipid-normalized CBR estimates of reproduction (fertility) and population growth suppression. Significant FS toxic effects were delayed naupliar development (at ≥0.10 µg L(-1)), delayed copepodite development (at 0.85 µg L(-1)), decreased reproductive success (at ≥ 0.39 µg L(-1)), and decreased offspring production (at 0.85 µg L(-1)). A reproductive median effective concentration (EC50) of 0.16 µg L(-1) (95% CI: 0.12-0.21 µg L(-1)) corresponded to an adult all-sex CBR and lipid-normalized CBR ...
In humans, early embryo development is a complex process that consists of sequential events: oocyte maturation, fertilization, embryonic growth and implantation. Disruption of these highly regulated processes results in reproductive failure and infertility. This study characterizes and describes embryonic aneuploidy, mitochondrial content level and endometrial microbial environment related to reproductive competence, in particular instances in which failure results. To examine the molecular underpinnings of mammalian gamete and early embryo chromosome segregation, we established a comprehensive chromosomal screening (CCS) method for mice poly bodies, oocytes and embryos by the application of whole genome amplification (WGA) and next generation sequencing (NGS). First, we validated this approach using single mouse embryonic fibroblasts engineered to have stable trisomy 16. We further validated this method by identifying reciprocal chromosome segregation errors in the products of meiosis I (gamete and
Class 8 Science Question- answers. Download a PDF of free latest Sample questions with solutions for Class 8, Science, CBSE- Reproduction in Animals . To link to this page, copy the following code to your site: NCERT Exemplar for Class 8 Science Chapter 9 Reproduction in Animals is a perfect tool for your CBSE Class 8 examination. ... STUDY MATERIAL FOR CBSE CLASS 8 SCIENCE; Chapter 1 - Cell Structure and Functions This exemplar solution will make you learn the concept comprehensively by giving you extra knowledge. binary fission. 30 seconds . Reproduction: Reproduction is the process by which living organisms produce more living organisms of its own kind. 1. Next, the sperm and egg join together to form a zygote. Group: Science Science Quizzes : Topic: Life Science : Share. Poll Quiz on Reproduction in Animals. Students can solve NCERT Class 8 Science Reproduction in Animals MCQs Pdf with Answers to know their preparation level. Mode of Reproduction: There are two main types of reproduction in ...
In ecological character displacement, traits involved in reproductive isolation may not evolve in arbitrary directions when changes in these traits are by-products of adaptation to an ecological niche. In reproductive character displacement, however, selection acts directly on reproductive characters to enhance the degree of reproductive isolation between sympatric populations. Thus, the direction of change in reproductive characters may be arbitrary in relation to changes in other morphological characters. We characterized both tegminal characters and characters indicative of body size in sympatric and allopatric populations of Gryllus fultoni, a species displaying character displacement in its calling song characters in areas of sympatry with G. vernalis populations, to infer the nature and direction of selection acting on reproductive and morphological characters in sympatry. Except for mirror area, the number of teeth in a file, and ovipositor length of G. fultoni, all male and female morphological
Whether contemporary human populations are still evolving as a result of natural selection has been hotly debated. For natural selection to cause evolutionary change in a trait, variation in the trait must be correlated with fitness and be genetically heritable and there must be no genetic constraints to evolution. These conditions have rarely been tested in human populations. In this study, data from a large twin cohort were used to assess whether selection will cause a change among women in a contemporary Western population for three life-history traits: age at menarche, age at first reproduction, and age at menopause. We control for temporal variation in fecundity (the baby boom phenomenon) and differences between women in educational background and religious affiliation. University-educated women have 35% lower fitness than those with less than seven years education, and Roman Catholic women have about 20% higher fitness than those of other religions. Although these differences were ...
Current environmental risk assessment (ERA) of chemicals for aquatic invertebrates relies on standardized laboratory tests in which toxicity effects on individual survival, growth and reproduction are measured. Such tests determine the threshold concentration of a chemical below which no population-level effects are expected. How well this procedure captures effects on individuals and populations, however, remains an open question. Here we used mechanistic effect models, combining individual-level reproduction and survival models with an individual-based population model (IBM), to understand the individuals responses and extrapolate them to the population level. We used a toxicant (Dispersogen A) for which adverse effects on laboratory populations were detected at the determined threshold concentration and thus challenged the conservatism of the current risk assessment method. Multiple toxicity effects on reproduction and survival were reported, in addition to effects on the F1 generation. We ...
Comprising over 1400 species worldwide, rodents are the largest taxonomic group of mammals (Nowak 1999). Rodent use of habitats is extensive and varied. Most rodent species are relatively small, secretive, prolific, adaptable, and have continuously growing incisors which require constant eroding by gnawing. Rodents are known for their high reproductive potential; however, there is much variability between species as to the age at first reproduction, size of litters, and the number of litters per year. All rodent species have ecological, scientific, social, and/or economic values. They recycle nutrients, aerate soils, distribute seeds and spores, and affect plant succession. Some provide meat and furs for people. Several species are used in large numbers in medical research. Additionally, they provide an important prey base for many species of predatory animals.
received his Doctor of Veterinary Medicine degree from the University of Ghent (Belgium) in 2004. After completing an internship in Equine Reproduction at a large Warmblood stud farm in the Netherlands, he moved to the Unites States to complete a Residency in Equine Reproduction (University of California, UC Davis) and become board certified by the American College of Theriogenologists. After being stud veterinarian in Australia he returned in 2010 to UC Davis to serve as clinical instructor in Equine Reproduction. In 2012 he enrolled in a PhD program at the Gluck Equine Research Center (University of Kentucky, USA). In 2014, Anthony was appointed as Assistant Professor in Equine Reproduction at University of Utrecht. He is responsible for the clinical activities surrounding the OPU/ICSI program and participates in the clinical gynaecology and traditional embryo transfer activities in the equine fertility unit. He has a special interest in advanced reproductive technologies. ...
The bromophenol 2,4,6-tribromophenol (TBP) is widely used as an industrial chemical, formed by degradation of tetrabromobisphenol-A, and it occurs naturally in marine organisms. Concentrations of TBP in fish have been related to intake via feed, but little is known about effects on fish health after oral exposure. In this study, we exposed adult male and female zebrafish (Danio rerio) to TBP via feed in nominal concentrations of 33, 330, and 3300 μg/g feed (or control feed) for 6 weeks to assess the effects of TBP on reproductive output, gonad morphology, circulatory vitellogenin levels, and early embryo development. The aim was also to investigate the extent to which TBP was metabolised to 2,4,6-tribromoanisole (TBA) in dietary exposed zebrafish, and the amounts of TBP and TBA found in offspring. After 6 weeks of exposure, we found about 3% of the daily dose of TBP in adult fish and the mean concentration of TBA was 25-30% of the TBP concentration. TBP and TBA were detected in offspring with ...
NIH Funding Opportunities and Notices in the NIH Guide for Grants and Contracts: Characterization of the Adolescent Reproductive Transition (R21 Clinical Trial Optional) PA-18-045. NICHD
Unscramble reproduction, Unscramble letters reproduction, Point value for reproduction, Word Decoder for reproduction, Word generator using the letters reproduction, Word Solver reproduction, Possible Scrabble words with reproduction, Anagram of reproduction
TY - JOUR. T1 - Effect of previous lambing date and subsequent month of mating on reproductive performance in Mule ewes. AU - Mitchell, L M AU - King, Michael. AU - Aitken, Raymond. AU - Wallace, Jacqueline. PY - 1999/8. Y1 - 1999/8. N2 - The objective was to determine the effect of previous lambing date and subsequent month of mating on reproductive performance in Mule (Bluefaced Leicester X Scottish Blackface) ewes. Sixty-four ewes which had previously lambed in January (13 January (s.e. = 1 day)) and 80 ewes which had previously lambed in May (15 May (s.e. = 1 day)) were allocated equally to four mating periods (30 August to 17 September, 1 November to 19 November, 3 January to 21 January and 14 February to 4 March) in a 2 X 4 factorial design. From 20 days before and during their designated mating period, January- and May-lambing ewes were separately housed in straw-bedded pens under natural photoperiod and were given 1 kg per head per day dried grass pellets. A-vasectomized ram was ...
Answer (1 of 1): Basically in eukaryotic reproduction cycle , the asexual reproduction involves mitosis only while the sexual reproduction involves meiosis and syngamy. Both of these processes are the counterparts of each other thats why both of them are required in the sexual reproduction. Meiosis and Syngamy, together make the reproduction process a cycle|. In the meiosis phase, the cells are gone through the cell division and get haploid number of chromosomes. The process of reproduction is completed when the two gametes are fused in the syngamy phase. In this way both of these processes are must in the completion of the reproduction cycle.
Goujon takes great pains to assert that spermatozoa had the potential to massage in north little rock ain usa needed NOW Ladies Im need of some FWB.. Alexinas identity is thus equated to her biological sexuality and the social sexuality that springs directly from it.. Though initially classified as a woman, according to Dr. Though Dr. Chesnet describes Alexinas voice: [It] is ordinarily stockton kik sluts of a woman, but sometimes in conversation or when she coughs, heavy, masculine tones mingle with it Im looking for friends and dont really have a way to meet new people, so here I am.. He assumes first that there are masculine tones and feminine find 37335 women for sex fuck wooster he further assumes that ones voice can be scientifically described in terms of these sex associations.. Not much into the club scene but not against wives wants hot sex tx white settlement 76108. Because of this assumption, sexual characteristics that do not affect reproduction are relegated to a secondary ...
TY - JOUR. T1 - Mechanisms associated with an advance in the timing of seasonal reproduction in an urban songbird. AU - Fudickar, Adam M.. AU - Greives, Timothy J.. AU - Abolins-Abols, Mikus. AU - Atwell, Jonathan W.. AU - Meddle, Simone L.. AU - Friis, Guillermo. AU - Stricker, Craig A.. AU - Ketterson, Ellen D.. N1 - Funding Information: We would like to thank Alexander Kauffman at UCSD for use of lab space and equipment and Tim Gentner at UCSD for serving as our representative to the IACUC. John McCormack and Brant Faircloth assisted with sequencing of the junco reference genome and provided support to GF. Jessica Graham, Emily Stewart, Katie Needham, Rachel Hanauer, Alex Hughes, Abby Kimmitt, Sam Slowinski, and Charli Taylor helped to collect and process samples. This work was funded by the National Science Foundation (IOS-1257474 to EK and IOS-1257527 to TG). SM acknowledges Roslin Institute strategic grant funding from the Biotechnology and Biological Sciences Research Council ...
Species-specific strategies for financing the costs of reproduction are well understood, forming a continuum ranging from high to low reliance on stored nutrients. Animals relying mostly on stored reserves are termed capital breeders, whereas income breeders rely mostly on concurrent intake when financing the costs of reproduction. The role and adaptive value of individual variation in these strategies remain elusive. Life-history theory posits that capital breeding should be favoured when offspring reproductive value peaks, typically occurring early in the season, and that current income should increasingly be used with progressing season. Because resource limitation may hamper flexible resource allocation, a corollary prediction is that only good-condition individuals may show the expected seasonal shift in resource use. To test this prediction, we examined stable isotopes (δ13C and δ15N) in blood and lipid-free egg yolk of breeding eider females (Somateria mollissima) from the Baltic Sea to
Prenatal and preimplantation testing technologies have offered unprecedented access to information about the genetic and congenital makeup of our prospective progeny. Future developments such as preconception testing, noninvasive prenatal testing, and more extensive preimplantation testing promise to increase that access further still. The result may be greater reproductive choice, but it also increases the burden on women and men to avail themselves of these technologies in order to avoid having a child who has a disability. The overwhelming question for legislators has been whether and, if so, how to regulate the use of these technologies in the face of compelling but seemingly contradictory claims about the advancement of reproductive choice and the dangers of eugenic or discriminatory effects. This book examines the evolution of this legislative oversight across a number of jurisdictions and explores the tensions and ambiguities that inform these laws. ...
Background Genes involved in male reproduction are often the targets of natural and/or sexual selection. SCML1is a recently identified X-linked gene with preferential expression in testis. To test...
Summary - The reproduction of Radopholus similis isolates from different origins and hosts was compared in carrot disk cultures at different temperatures. At 15°C, only the isolates collected from ornamental plants in Europe reproduced. The greatest fecundity was observed at 25°C. The reproduction factor (final population/initial population: Pf/Pi) ranked the isolates in similar order for four of the temperatures studied (15, 20, 25 and 30°C). When carrot discs at 28°C were inoculated with single females of isolates selected from those with different reproductive factors, this ranking was confirmed. This suggests that reproduction is controlled by intrinsic isolate characteristics which are not influenced by temperature. Isolates with most reproduction had a greater percentage of reproductive females than isolates with less reproduction, associated with a high ratio of females : males and a high proportion of females in the total production. The mean offspring per productive female was similar for
reproductive system - Reproductive Cells and Gonads - The basic organs of sexual reproduction are the gonads, which are ovaries in females and testes in males. The gonads are dormant until they are activated by hormones at sexual maturity. (See also Sexuality.)The male gametes, called spermatozoa or sperm, are produced in the testes. Spermatozoa are microscopic tadpole-shaped cells with long tails. In all invertebrates the testes are internal, but in most mammals, including humans, they lie in an external sac called the…
This one-generation study assessed the potential of esterified propoxylated glycerol (EPG) to affect reproduction and offspring development in rats. Male and female Crl:CD(SD)BR rats (30/sex/group) were exposed to EPG at 0, 0.5, 1, and 2g/kgbw/day or at 5% (w/w) in the diet prior to (13weeks), during, and after two consecutive matings. For dams, exposure continued through gestation and lactation; F1a and F1b pups were weaned to the respective diet (for up to 91days).
The peculiar bone histology of Myotragus provides direct evidence of the developmental and growth strategy and indirect evidence regarding the physiology of this insular dwarf mammal. The presence of lamellar-zonal bone throughout the cortex indicates that Myotragus grew at slow and variable rates and ceased growth cyclically, which was associated with an important delay in the attainment of skeletal (sexual) maturity. Consistent with life history theory (30), the extended juvenile development of Myotragus was associated with an extended life span as indicated by the elevated number of very old individuals in the fossil assemblages (10). Our empirical finding, hence, does not support the prediction that life history traits of insular dwarfs accelerate to increase reproductive investment (12-15), but instead lends support to the model that predicts a shift in life history traits toward the slow end of the slow-fast continuum with a delay in age at maturity and an extended life span (16).. True ...
Our data provide no evidence that positive selection is enhanced in sympatry, and if these candidate GRPs are involved in prezygotic isolation, we have no evidence for enhanced prezygotic isolation. The polymorphism statistics likewise give no indication that RCD is occurring in these three proteins.. We cannot necessarily conclude from lack of evidence for RCD in CIPRO37.40.1, CIPRO60.5.1 and CIPRO100.7.1 that RCD is not occurring in this system. If enhanced prezygotic isolation between Type A and B does exist, there are several reasons why we might not have detected it in this study. First, primers for candidate GRPs were developed from the Type A genomic sequence and were used to amplify and sequence both Type A and B individuals (the Type B genome has not been sequenced). But Type A and B are substantially divergent (p-distances: 0.124 at mtCOI, 0.035 to 0.116 for six nuclear loci; [43]), which could explain why 15 genes encoding GRP candidates could not be successfully amplified and/or ...
Sexual reproduction is the process responsible for the creation of a zygote. A zygote is a diploid cell (2n) which is created by the fusion of two haploid germ cells (n), the female and male gametes.. The zygote is representative of an organisms earliest stage of development. Once fertilization takes place between the female ovum and the male sperm cell, a single diploid cell is formed. The DNA of both parents contributes to this diploid cell. The specifics of reproduction in different eukaryotic organisms vary and in plants reproduction is often asexual. Asexual reproduction produces identical copies of the parents except when mutations take place.. In eukaryotes, there are two main processes in sexual reproduction. First there is meiosis and then fertilization. During fertilization the two gametes are fused together, which regenerates the number of chromosomes of the newly formed cell back to normal (46 chromosomes), since during meiosis the number of chromosomes is halved.. Sexual ...
Figure 2: Hormonal development during oestrus cycle.. Out of these, Progesterone has been chosen to be analysed by Herd Navigator™ because it is the one that can provide the most information about the reproductive status of the cow throughout the whole lactation.. After calving the cow has no ovarian activity (anoestrus) and will not produce any progesterone. After some weeks the cow will start ovarian activity, will show heat signs and ovulate. After the ovulation the corpus luteum will be formed in the ovary and start producing Progesterone. Progesterone production will cease when the cow is approaching a new heat and will restart again after the new ovulation. This cycle is repeated every 18 to 24 days until the cow becomes pregnant. In this case the corpus luteum will continue producing Progesterone to maintain the pregnancy (Figure 3). Progesterone production will continue until calving unless the cow aborts, in this case Progesterone production will stop.. ...
Figure 2: Hormonal development during oestrus cycle.. Out of these, Progesterone has been chosen to be analysed by Herd Navigator™ because it is the one that can provide the most information about the reproductive status of the cow throughout the whole lactation.. After calving the cow has no ovarian activity (anoestrus) and will not produce any progesterone. After some weeks the cow will start ovarian activity, will show heat signs and ovulate. After the ovulation the corpus luteum will be formed in the ovary and start producing Progesterone. Progesterone production will cease when the cow is approaching a new heat and will restart again after the new ovulation. This cycle is repeated every 18 to 24 days until the cow becomes pregnant. In this case the corpus luteum will continue producing Progesterone to maintain the pregnancy (Figure 3). Progesterone production will continue until calving unless the cow aborts, in this case Progesterone production will stop.. ...
Looking for online definition of net reproductive rate in the Medical Dictionary? net reproductive rate explanation free. What is net reproductive rate? Meaning of net reproductive rate medical term. What does net reproductive rate mean?
Tags: Mirela petrean album 2013, Bug out vehicle loadout, Asexual Reproduction PowerPoint Presentation Lesson Plan. Natural Vegetative Propagation, Artificial Vegetative Propagation. $ Asexual Reproduction In Animals Vegetative Reproduction Teacher Resources Biology Presentation Life Science Science Lessons Activities Education. Sexual and Asexual Reproduction Concept Sort. Apr 12, · Asexual vs Sexual Reproduction 1. Asexual vs. Sexual Reproduction Note: If you are viewing this PPT at home, some videos may not play. 2. Asexual Reproduction• Asexual reproduction is the process by which a single organism produces genetically identical offspring.•. Methods of Reproduction Sexual and Asexual Reproduction Asexual Reproduction: requires only 1 parent and the offspring are an exact copy of the parenta clone Asexual Reproduction: Organisms that reproduce asexually cannot develop much variety, . Reproduction Sexual Reproduction Asexual Reproduction Asexual Reproduction: Genetically Identical ...
Handbook of drug therapy in reproductive endocrinology and infertility , Handbook of drug therapy in reproductive endocrinology and infertility , کتابخانه دیجیتال دانشگاه علوم پزشکی اصفهان
It is interesting to note that all bone and weight gains seen in paired female mole-rats appeared several weeks after removal from reproductive suppression and became statistically discernible from males or controls approximately 6-10 weeks after colony separation. This is most likely because small increases in growth need to accumulate to be observable. This explanation was confirmed by the growth rate data, which can be a more sensitive index of subtle changes that are occurring in bone turnover. Although it took weeks to see the net increase in bone length, increased bone growth rates in paired females occurred during the 5-week block immediately after colony separation, and this growth rate peaked 10 weeks after colony separation. Therefore, growth mechanisms appeared to accelerate immediately after colony separation. The growth rate data demonstrated a pattern that consisted of an initial sharp increase and asymptote in growth, with elevated growth rates continuing for several weeks before ...
4. The type of division, in which two individuals are formed from a single individual, is … Budding 3. The segments rapidly grow new cells to constitute their muscle fiber and internal structure through mitosis. These are binary fission, budding, vegetative reproduction, fragmentation and by spores. Segmented worms and many echinoderms such as starfish reproduce asexually via fragmentation. Organisms produced by asexual reproduction are the product of mitosis. There are two types of reproduction - sexual reproduction and asexual reproduction. Asexual reproduction is the primary form of reproduction for single-celled organisms such the archaea, bacteria, and protists. Natural selection, the mechanism for evolution, chooses which traits are favorable adaptations for a given environment and which are unfavorable. A particular type of cell known as a gemmule can develop into a new organism. But in the long term (over several generations), lack of sexual reproduction compromises their ability to ...
Despite being listed as endangered on the IUCN (World Conservation Union) red list (Anon, 2006) and intense conservation efforts on its behalf, little is known about the reproductive biology of the Fijian ground frog (Platymantis vitianus). Breeding is important for species survival and hormones are the essence of reproduction. The certain aspects of captive breeding and reproductive endocrinology of P. vitianus is studied so that the basic reproductive patterns can be understood. The breeding of P. vitianus is being studied in a purpose built outdoor enclosure based at the University of the South Pacific (USP), Fiji Islands as an insurance policy while invasive species eradication work is on-going on Viwa Island (one of the five remaining mongoose [Herpestes javanicus] free island habitats of P. vitianus). Primary focus of captive breeding is to establish an ex-situ captive management strategy, egg-embryo management and monitoring the health status of P. vitianus. Under the ex-situ captive ...
The evolution and maintenance of sexual reproduction may involve important tradeoffs because asexual reproduction can double an individuals contribution to the gene pool but reduces diversity. Moreover, in social insects the maintenance of genetic diversity among workers may be important for colony growth and survival. We identified a previously unknown termite breeding system in which both parthenogenesis and sexual reproduction are conditionally used. Queens produce their replacements asexually but use normal sexual reproduction to produce other colony members. These findings show how eusociality can lead to extraordinary reproductive systems and provide important insights into the advantages and disadvantages of sex.. ...
We studied annual and lifetime reproductive success (LRS) of both sexes of common buzzard Buteo buteo in eastern Westphalia, Germany. We followed a bottom-up approach starting from individual breeding attempts, over lifetime reproductive success to derive population demography. Annual breeding performance and survival followed a quadratic relationship with breeding experience; individuals starting their breeding career were less likely to survive and breed successfully than birds of intermediate breeding experience. According to an analysis of selection gradients, both the opportunity and intensity of selection peaked in the early stages of the breeding career. The distribution of both LRS and another fitness measure, lambda, was highly skewed, with ca 17% of adult birds producing 50% of fledglings in both sexes. Besides breeding life span and number of breeding attempts, habitat quality and plumage morph were significant predictors of LRS. There were strong differences in LRS and lambda between ...
TY - JOUR. T1 - Identification of porcine Lhx3 and SF1 as candidate genes for QTL affecting growth and reproduction traits in swine. AU - Smith, T. P.L.. AU - Showalter, A. D.. AU - Sloop, K. W.. AU - Rohrer, G. A.. AU - Fahrenkrug, S. C.. AU - Meier, B. C.. AU - Rhodes, S. J.. PY - 2001. Y1 - 2001. N2 - The distal portion of the long arm of porcine chromosome 1 has been shown to harbour several quantitative trait loci affecting growth and reproductive traits in swine. In order to identify potential candidate genes that might underlie these effects, a comparative mapping analysis was undertaken to define the extent of orthologous segments of human chromosome 9. A microsatellite associated with heat shock protein (HSP) A5 was used to define the proximal boundary of the quantitative trait loci (QTL) region, which suggests the human orthologue of the gene(s) responsible for the observed effects lies between HSPA5 and the q arm telomere of human chromosome 9. Examination of this region revealed two ...
Robert Hermes, DVM, Ph.D.(born November 15, 1969 in Celle, Germany) is a veterinarian researcher at The Leibniz-Institute of Zoo and Wildlife Research in Berlin. He studied veterinary medicine at the Freie Universität Berlin. He completed a Ph.D. in reproductive management. Hermes was a member of the Indianapolis Zoo team, that accomplished the worlds first successful artificial insemination of an African elephant. He completed a postdoctoral research project concentrated on the reproductive management of African elephants. Hermes is a researcher at The Leibniz Institute for Zoo and Wildlife Research(IZW), in the department of reproductive management. His research concentrates on the reproductive management of elephants and rhinoceros. Hermes has supervised doctoral candidates researching reproductive management in a variety of animal species. Hermes is an integral member of the eminent IZW researchers in animal reproductive management. Dr. Thomas Bernd Hildebrandt, head of the IZW Department ...
Histology Of Female Reproductive System 18 Medical School Histology Female Reproductive System Part 3 photo, Histology Of Female Reproductive System 18 Medical School Histology Female Reproductive System Part 3 image, Histology Of Female Reproductive System 18 Medical School Histology Female Reproductive System Part 3 gallery
External Female Reproductive System Picture Female Reproductive System Diagram External View Anatomy Human Body photo, External Female Reproductive System Picture Female Reproductive System Diagram External View Anatomy Human Body image, External Female Reproductive System Picture Female Reproductive System Diagram External View Anatomy Human Body gallery
Reproduction (or procreation or breeding) is the biological process by which new individual organisms - offspring - are produced from their parents. Reproduction is a fundamental feature of all known life; each individual organism exists as the result of reproduction. There are two forms of reproduction: asexual and sexual. In asexual reproduction, an organism can reproduce without the involvement of another organism. Asexual reproduction is not limited to single-celled organisms. The cloning of an organism is a form of asexual reproduction. By asexual reproduction, an organism creates a genetically similar or identical copy of itself. The evolution of sexual reproduction is a major puzzle for biologists. The two-fold cost of sexual reproduction is that only 50% of organisms reproduce and organisms only pass on 50% of their genes. Sexual reproduction typically requires the sexual interaction of two specialized organisms, called gametes, which contain half the number of chromosomes of normal ...
TY - JOUR. T1 - Overexpression of transforming growth factor α in transgenic mice alters nonreproductive, sex-related behavioral differences. T2 - Interaction with gonadal hormones. AU - Hilakivi-Clarke, L.. PY - 1994. Y1 - 1994. N2 - Sexually dimorphic differences in voluntary sodium intake, locomotor activity, immobility in the swim test, and aggressive behavior were found to be altered in transgenic CD-1 mice that overexpressed transforming growth factor α (TGFα). In contrast to nontransgenic CD-1 mice, immobility in the swim test was longer and sodium intake higher in the male TGFα mice than in the female TGFα mice. These findings indicate that the male TGFα mice exhibited feminization of some behaviors. Furthermore, the male TGFα mice were highly aggressive. Castration reversed the behavioral effects in the adult male transgenic mice, but ovariectomy did not reverse the behavioral effects in the adult female transgenic mice. Thus the feminizing effect of TGFα on some nonreproductive ...
Kansas State University entomologists have helped identify a neuropeptide named natalisin that regulates the sexual activity and reproductive ability of insects.
Reproductive endocrinology & Infertility is an open access, peer-reviewed journal that publishes articles on all aspects of endocrinology & infertility.
FERTILITY AND STERILITY VOL. 82, NO. 5, NOVEMBER 2004 Copyright 2004 American Society for Reproductive Medicine Published by Elsevier Inc. Printed on acid-free paper in U.S.A. REPRODUCTIVE ENDOCRINOLOGY
Our team of nationally recognized reproductive endocrinology specialists is dedicated to helping couples fulfill their desire to build a loving family.
Trusted Endometriosis Specialist serving Atlanta, GA. Contact us at 404-594-8974 or visit us at 3193 Howell Mill Road NW, Suite 209, Atlanta, GA 30327: Reproductive Endocrinology and Infertility Group
Reproductive Endocrinology:Training in reproductive medicine,hormonal functioning.Trained endocrinologist diagnose & treat hormonal dysfunctional issues.
Asexual reproduction is the mode of reproduction in prokaryotes. In particular, prokaryotes reproduce through binary fission. Eukaryotes, especially higher forms of animals, reproduce through sexual means, i.e. by sexual reproduction. In sexual reproduction, gametes are produced by meiosis. A male gamete fertilizes the female gamete, forming a zygote. Some eukaryotes are capable of asexual reproduction. In asexual reproduction, the organism is capable of reproducing an offspring in the absence of a mate. As a result, the offspring is a clone of the parent and therefore results in low genetic variation in the species as a whole. Some species are capable of heterogamy, i.e. the ability to alternate between sexual and asexual reproduction. ...
Considerable information is available on the reproductive function of goats, but research on reproductive management of goats in the U.S. has focused mostly on milk and fiber production systems and has not been directed at meat as the primary product. In a meat production system, however, reproductive performance is of paramount importance since productivity is largely a function of the number of offspring born and weaned and the frequency with which they are produced.
Reproduction. Scope Note Narrower Term: Cattle Reproduction Narrower Term: Cell nuclei Transplantation Narrower Term: Conjugation (Biology) See Also: Embryology Narrower Term: Fertility Narrower Term: Fertilization (Biology) Narrower Term: Fetus Narrower Term: Gametogenesis See Also: Generative organs Narrower Term: Gynogenesis Narrower Term: Human reproduction Narrower Term: Isolating mechanisms Narrower Term: Ovulation Narrower Term: Paedogenesis Narrower Term: Parthenogenesis Narrower Term: Parthenogenesis in animals Narrower Term: Parturition Narrower Term: Pregnancy Narrower Term: Sexual cycle Narrower Term: Spawning Narrower Term: Spontaneous generation See Also: Theriogenology Narrower Term: Viruses Reproduction Narrower Term: Viviparity Narrower Term: Domestic animals Reproduction Narrower Term: Livestock Reproduction Narrower Term: Bacteriophage mu Reproduction Narrower Term: Oncogenic DNA viruses Reproduction Narrower Term: Herpes simplex virus Reproduction Narrower Term: Herpesviruses ...
ALCOHOLS EFFECTS ON FEMALE REPRODUCTION. The following section details alcohols effects on puberty, the female reproductive system, and postmenopause, as revealed by human and animal studies.. Alcohol and Puberty. Rapid hormonal changes occurring during puberty make females especially vulnerable to the deleterious effects of alcohol exposure during this time. Thus, the high incidence of alcohol consumption among middle school and high school students in the United States is a matter of great concern. A national survey of students revealed that 22.4 percent of 8th graders and 50 percent of 12th graders reported consuming alcohol in the 30 days before the survey (Johnston et al. 2001). Little research on the physiological effects of alcohol consumption during puberty has focused on human females. However, one study found that estrogen levels were depressed among adolescent girls ages 12 to 18 for as long as 2 weeks after drinking moderately (Block et al. 1993). This finding suggests the ...
TY - JOUR. T1 - Metabolic, endocrine, and reproductive changes of a woman channel swimmer. AU - Frisch, Rose E.. AU - Hall, George M.. AU - Aoki, Thomas T.. AU - Birnholz, Jason. AU - Jacob, Robert. AU - Landsberg, Lewis. AU - Munro, Hamish. AU - Parker-Jones, Kirtly. AU - Tulchinsky, Dan. AU - Young, James. PY - 1984/12. Y1 - 1984/12. N2 - We report the coordinated metabolic, hormonal, and reproductive data of a female channel swimmer during the pre-swim training period, immediately post-swim, and in the post-swim untrained state. Urine and blood samples collected at these times were assayed for diurnal urinary catecholamines, urinary C-peptide and 3-methylhistidine, total blood ketone bodies, glycerol, the reproductive hormones, adrenal androgens, and thyroid hormones. Subcutaneous fat was measured by ultrasonography. All of the metabolic and hormonal data post-swim except cortisol reflected the severe physiological stress. Urinary catecholamines returned to near-normal levels by 12 hours ...
Translocation of mothers with dependent calves is ill-advised, especially when restocking. Interestingly, there was a sex-differential risk when using juvenile and young adults to restock populations. These may have important implications for sex- or age-biased translocation strategies designed to reduce the impact of harvest on the source population or maximize productivity after release. Juvenile, but not young adult, females had high post-release mortality. The reverse was true for males where juvenile males did not feature in mortality statistics but were a large portion of young adult deaths.. Sex differential mortality amongst juvenile and young adult age classes might be due to sex differences in age at first reproduction because it is a high-risk period in a large polygynous vertebrates life. Female black rhinoceros attract the sexual interest of bulls at their first oestrous around 3·5 years of age (first parturition between 4·8 and 5·3 years, Schenkel & Schenkel-Hulliger 1969; and ...
Austin Journal of Environmental Toxicology is an open access, Scholarly journal dedicated to publish articles in all areas of Environmental Toxicology.
Dr. Mark P. Leondires is the Founder, Medical Director and Partner in reproductive endocrinology at Reproductive Medicine Associates of Connecticut (RMACT) and Gay Parents To Be (GPTB). He is board-certified in both Obstetrics and Gynecology and Reproductive Endocrinology and Infertility. Board-Certified Reproductive Endocrinologist: Infertility Doctor - Connecticut & New York For Dr. Mark Leondires, medicine offers an opportunity to solve problems; each fertility patient presents a unique puzzle. This, combined with a wide range of interests and life events, is how Dr. Leondires came into reproductive endocrinology and infertility and to start his own fertility practice. From the beginning, as one of four children born to his Greek-immigrant parents, Dr. Leondiress environment has infiltrated and shaped the person he would become. In his early years, Dr. Leondires was raised with a prideful interest of ancient history and architecture, rooted in Greek contributions. This eventually led to a ...
View Notes - Chapter 36 Animal Reproduction from BIOL 1006 at Virginia Tech. Chapter 36 Animal Reproduction Vocabulary Acrosome sac at the head of sperm containing enzymes to allow the sperm to
Costs of reproduction are an integral and long-standing component of life-history theory, but we still know relatively little about the specific physiological mechanisms underlying these trade-offs. We experimentally manipulated workload during parental care in female European starlings (Sturnus vulgaris) using attachment of radios and/or wing clipping and assessed measures of workload, current breeding productivity, future fecundity, and survival (local return rate) in relation to treatment. Females with wing clipping and radio attachment paid a clear cost of reproduction compared with all other treatment groups: they had lower future fecundity and lower return rates despite having lower current breeding productivity. We then measured 13 physiological traits, including measures of aerobic/metabolic capacity, oxidative stress and muscle damage, intermediary metabolism and energy supply, and immune function. Our results show that the cost of reproduction in females with wing clipping and radio ...
One of the key tenets of life-history theory is that reproduction and survival are linked and that they trade-off with each other. When dietary resources are limited, reduced reproduction with a concomitant increase in survival is commonly observed. It is often hypothesized that this dietary restriction effect results from strategically reduced investment in reproduction in favor of somatic maintenance to survive starvation periods until resources become plentiful again. We used experimental evolution to test this waiting-for-the-good-times hypothesis, which predicts that selection under sustained dietary restriction will favor increased investment in reproduction at the cost of survival because good-times never come. We assayed fecundity and survival of female Drosophila melanogaster fruit flies that had evolved for 50 generations on three different diets varying in protein content-low (classic dietary restriction diet), standard, and high-in a full-factorial design. High-diet females ...
TY - JOUR. T1 - Photoperiod. T2 - Its importance as an impeller of pineal and seasonal reproductive rhythms. AU - Reiter, R. J.. PY - 1980/3/1. Y1 - 1980/3/1. N2 - A number of long day breeding rodents depend on seasonal changes in photoperiodic length to synchronize their breeding seasons with the appropriate time of the year. These relationships are particularly conspicuous in the Syrian hamster where day length is vitally important in determining periods of sexual activity and inactivity. The organ in the body whose activity is most closely attuned to the photoperiodic environment is the pineal gland. During periods of darkness the biochemical and secretory activity of the pineal is enhanced with the resultant production of antigonadotrophic principles which are strongly suppressive to reproductive physiology. In this manner, decreasing day lengths of the fall are involved with suppressing sexual capability in male and female hamsters. Throughout the winter months darkness (because of the ...
View best Ivf Assisted Reproduction in BLK Super Speciality Hospital Delhi NCR. Check profile, OPD fee, reviews and schedule of Ivf Assisted Reproduction doctors and book Ivf Assisted Reproduction appointment online.
The Fertilome Test is the first multigene panel test for womens risk of reproductive conditions approved by the NY State Department of Health
Jun 08, · For plants that rely on sexual reproduction, the maturity process for a crop yield can be several months. This shortened growing time makes it possible for multiple yields in some environments. What Are the Disadvantages of Asexual Reproduction? 1. Negative mutations linger longer in asexual . Jan 28, · Asexual reproducers do not have to carry their offspring for a long amount of time and produce more than one at a time. This makes it a quick and inexpensive process for them in the terms of time. The Disadvantages of Asexual Reproduction. 1. No Diversity Since the traits of only one parent is passed on, all of the offspring are exactly.. Disadvantages of sexual reproduction and asexual reproduction in Long Beach
The swine herd in this research was located in Chiang Mai province, Northern Thailand (latitude 18° 47′ 43″ North and longitude 98° 59′ 55″ East). The climate of the area is tropical, with average temperature ranging from 17°C to 35°C, average relative humidity ranging from 37% to 99%, and average rainfall ranging from 880 mm to 1,457 mm over the last thirteen years [10]. Seasons were defined as winter (November to February), summer (March to June), and rainy season (July to October). Gilts and sows were housed in an open-house system with water dripper, sprinkler, and fans, while boars were kept in an enclosed barn with an evaporative cooling system. Boars were fed 2.5 kg/d of feed with 16% crude protein and 3,200 to 3,500 kcal/kg. Sows received rations of different composition depending on the status of their reproductive cycle. Gilts and non-lactating sows were fed 2.5 kg/d of feed with 16% crude protein and 3,200 to 3,500 kcal/kg of energy. Nursing sows were fed 5 to 6 kg/d of ...
Reproduction is influenced by the physiological and environmental modulation of the hypothalamic gonadotropin-releasing hormone (GnRH) neuronal network. GnRH hypothalamic activity is reflected in the systemic circulation by its downstream effector, luteinising hormone (LH). During stress, the GnRH-dependent LH activity that is required for adequate gonadal development and function is suppressed by glucocorticoids secreted by the adrenal glands. Emerging research in the field of stress-induced infertility show glucocorticoids do not directly inhibit GnRH activity and instead may act via the inhibitory RFamide-related peptide (RFRP) neurons, which suppress GnRH secretion. Thus far, this intermediary inhibitory role of RFRP neurons between the stress and reproductive axes is mainly supported by the upregulated expression of hypothalamic RFRP activity with stress in both sexes. Using a transgenic mouse model, the experiments in this thesis examine whether hypothalamic RFRP neuronal signalling is ...
Are you two twins? Asexual Reproduction: Asexual Reproduction: -Used by many unicellular organisms, plants, and lower animals. -Involves only mitotic cell division = each offspring has exactly the same heredity as its parent. -Usually rapid compared to sexual reproduction. Types of Asexual Reproduction Include:
Invitation to join the Plant Reproduction listserv ---------------------------------------------------- Under supervision of the International Association of Sexual Plant Reproduction Research (IASPRR) an Internet list service is opened for scientists studying plant sexual reproduction of higher plants. With this list a communication by E-mail is possible among all subscribers of the list. Such list offers for example the opportunity: to exchange scientific -knowledge, ideas -information, questions to announce -congresses, books, courses -jobs, projects -information of the IASPRR, Journal Sexual Plant Reproduction The list owner is the secretary of the IASPRR, there is no archive of the messages. This mail invites you to join the list. In case you know other interested scientists, invite them to subscribe also. Subscription to PLANT-REPR list ------------------------------- Scientists with an e-mail number can send a message to: listserv at nic.surfnet.nl message: sub plant-repr your name You ...
For studying the influence of feed and temperature on gonad growth and maturity of the baby clam Marcia opima, experiments were conducted for 45 days at temperatures of 23°C and 28°C. The progress of gonadal recovery was followed by periodic determination of gonadosomatic index, condition index, digestive gland index and oocyte diameter. There was significant difference in the gonadosomatic index between fed and unfed clams at 23°C and 28°C. No significant difference in the gonadosomatic index was noted in the fed treatments at 23°C and 28°C, but the time of conditioning had significant influence on the gonadosomatic index. A significant relationship was found between the gonadosomatic index and condition index of the clams in all the treatments. ...
State Standard 2E. Compare the advantages of sexual reproduction and asexual reproduction in different situations. Meiosis & Sexual Reproduction (10.1)
Abstract: Heritablities and correlations were estimated between lamb body weight at different ages and reproductive traits in the Lori-Bakhtiari sheep breed. Data and pedigree information for Lori-Bakhtiari sheep used in this study were 5826 records of body weight of lambs from 240 sires and 1627 dams, and 5741 records of reproductive traits from 1797 ewes collected from 1989 to 2006 from a Lori-Bakhtiari flock at the Shooli station in Shahrekord. The lamb traits investigated were weights at birth (BWT), weaning (WWT) and at six months of age (WT6). The reproductive traits were conception rate (CR), litter size at birth per ewe lambing (LSB/EL), litter size at weaning per ewe lambing (LSW/EL), litter size at birth per ewe exposed to a ram (LSB/EE), litter size at weaning per ewe exposed (LSW/EE), total litter weight at birth per ewe lambing (TLWB/EL), total litter weight at weaning per ewe lambing (TLWW/EL), total litter weight at birth per ewe exposed (TLWB/EE) and total litter weight at ...
ABSTRACT. In Mexico City, Chapultepec Zoo is working together with the Zoological Society of San Diego and Ueno Zoo in Japan on the improvement of assisted techniques for the reproduction of the Giant Panda (Ailuropoda melanoleuca) a highly endangered species native to the Peoples Republic of China.. The Giant Panda is a seasonally monoestrus species in which the estrus lasts from 9 to 11 days, spontaneously ovulating and being sexually receptive for only 2 or 3 days. In Mexico the Giant Panda females have presented an estrus peak within mid February until mid April. Therefore, accurate monitoring of the estrus cycle to pinpoint the time of ovulation is critical for the timed mating or artificial insemination. Monitoring estrogen (E1G) and progesterone (PdG) in a non-invasive way indicates hormonal changes that are continuously evaluated and corroborated with modifications on the vaginal cytology and behavior, as well as to confirm or discard pregnancy and to predict birth time.. Hormone ...
Billy Kim is currently the Embryology Technical Supervisor and is certified through the American Association of Bio Analysts. He holds an earned BSc, MSc, and PhD about Animal Reproductive Science at the Kangwon National University in South Korea. He completed his post-doctoral researcher and fellowship supported NIH training in reproductive sciences training grant at Division of Reproductive Endocrinology and Infertility, Department of Reproductive Medicine, University of California San Diego. He has studied regulation of Hypothalamic-Pituitary-Gonadal axis on reproductive endocrinology. Recently he also published research papers about the Role of Oxidative Stress in gonadotropin release hormone signal pathway. He has published over 22 research papers in the field of reproductive biology. He worked as an embryologist at Houston Fertility Institute in Texas as a senior embryologist before joining Carolina Conceptions. He is highly skilled in all aspects of IVF procedures including egg ...
Appraisal of reproductive strategy and fecundity is necessary to evaluate the reproductive potential of individual fish species. To estimate reproductive potential, one needs to consider a variety of attributes including onset of maturity, fecundity, atresia, duration of reproductive season, daily spawning behaviour and spawning fraction. In this contribution, we review several methods currently used to estimate fecundity of marine fishes collected in the field in relation to their reproductive strategy. The advantages and disadvantages of each method are provided. Requirements are given to appropriately sample gonadal tissue that will enable researchers to establish incidence of sexual maturity and estimate fecundity ...
Ghrelin is a metabolic hormone released by the stomach at increased levels during times of fasting. It is known that ghrelin has suppressive effects on reproduction, for example by decreasing luteinizing hormone (LH) pulsatility. Whether it also inhibits the neuroendocrine control of ovulation is unknown. We set up three experiments to delve further into ghrelins actions on the control of reproduction by the hypothalamus, the region of the brain critical for control of the reproductive axis. In the first experiment we established a protocol to abolish the preovulatory LH surge in mice by fasting them for 36 hours or treating with 20mg/kg ghrelin at 2 hourly intervals on the afternoon of the surge. We then examined whether restoration of ghrelin levels to a non-fasted state by using mice with a knocked-out ghrl gene, restoration of leptin levels by administration of 1mg leptin/kg in at ~12 hourly intervals, or restoration of both would restore the surge in the fasted mice. We found that neither ...