The pollution of endocrine disruptors and its impact on human reproductive system have attracted much attention. Di-(2-ethylhexyl) phthalate (DEHP), an environmental endocrine disruptor, is widely used in food packages, containers, medical supplies and childrens toys. It can cause diseases such as infertility, sexual precocity and uterine bleeding and thus arouse concerns from the society and scholars. The effect of DEHP on pubertal female reproductive system is still not well-studied. This study was to investigate the effects of DEHP on the hypothalamus-uterus in pubertal female rats, reveal the reproductive toxicity of DEHP on pubertal female rats and its mechanism, and provide scientific evidence for the evaluation of toxicity and toxic mechanism of DEHP on reproductive system. Forty-eight pubertal female rats were randomly divided into four groups and respectively administered via oral gavage 0, 250, 500, or 1000 mg/kg/d DEHP in 0.1 mL corn oil/20 g body weight for up to four weeks. Compared with
TY - JOUR. T1 - Activation of growth hormone short loop negative feedback delays puberty in the female rat. AU - Advis, J. P.. AU - Smith-White, S.. AU - Ojeda, Sergio. PY - 1981. Y1 - 1981. N2 - Implantation of GH in the median eminence of the hypothalamus of 23-day-old female rats tonically inhibited serum GH levels throughout prepubertal development (days 23-36) and depressed GH diurnal pulsatile release. Puberty was significantly delayed in GH-deficient animals, a delay associated with a blunted in vitro ovarian steroidal responsiveness to gonadotropins (particularly estradiol) and a marked decrease in prepubertal uterine weight, as evaluated 4, 7, and 13 days after GH implantation. The prepubertal body weight increase was also depressed. Neither ovarian weight nor serum levels of LH, FSH, PRL, or TSH were consistently altered by the GH implant. In addition, evaluation of pulsatile PRL release in 33-day-old rats revealed no difference between control and GH-deficient animals. Ovarian LH ...
The objective of the study was to characterize body growth, testicular development, and puberty from 8 to 14 mo of age in bulls (n = 120) produced by mating sires from Hereford, Angus, Norwegian Red, Swedish Red and White, Friesian, and Wagyu breeds to MARC III (¹⁄₄ Hereford, ¹⁄₄ Angus, ¹⁄₄ Red Poll, and ¹⁄₄ Pinzgauer) cows. Traits evaluated were birth weight, weaning weight (at 215 d), yearling weight, ADG from 8 to 14 mo of age, paired testicular volume growth from 8 to 14 mo of age, age at puberty (determined by production of 50 × 106 sperm with 10% motility), age at freezable semen (determined by production of 500 × 106 sperm with 50% motility), and, at 15 mo of age, paired testicular weight and daily sperm production per testis pair. There was an effect of sire breed (P = 0.03) for age at puberty; animals with Wagyu and Swedish Red and White inheritance reached puberty at a later date (302 and 302 d of age, respectively) compared with Angus-sired bulls (268 d). Age at puberty
Consuming excess dietary salt may result in late onset of puberty that can lead to behavioural problems, stress and reduced fertility, new research says
Este estudo avaliou o crescimento físico e desenvolvimento puberal de crianças e adolescentes de 10 anos a 18 anos e 6 meses com fissuras labiopalatinas (FLP). Foi realizado um estudo descritivo transversal,...
Japans largest platform for academic e-journals: J-STAGE is a full text database for reviewed academic papers published by Japanese societies
vaginal opening - MedHelps vaginal opening Center for Information, Symptoms, Resources, Treatments and Tools for vaginal opening. Find vaginal opening information, treatments for vaginal opening and vaginal opening symptoms.
The objective of this research project is to determine whether exposure to dioxins, a byproduct of industrial processes and an environmental contaminant, is associated with altered growth and sexual maturation in boys. Specific objectives include exploring whether physical growth is delayed and stunted, whether sexual maturation is delayed, and whether reproductive hormones are altered. Dioxin levels will be measured in blood samples drawn from the boys and their mothers. Yearly physical examinations will be performed to assess growth velocity and onset and tempo of sexual maturation. Questionnaire data will be collected on birth and medical history, as well as lifestyle factors. Statistical modeling will be used to explore the relationship between serum levels of dioxin and altered physical growth and sexual maturation.. ...
Diagnosis of hormonal disorder in women during sexual maturation (costs for program #151233) ✔ University Hospital Münster ✔ Department of Gerneral Internal Medicine, Gastroenterology and Metabolic Disorders (Medical Department B) ✔ BookingHealth.com
Development-related changes in the expression of the ovarian Kiss1 and Kiss1r genes and their sensitivity to human chorionic gonadotropin in prepubertal female ratsDevelopment-related changes in the expression of the ovarian Kiss1 and Kiss1r genes and their sensitivity to human chorionic gonadotropin in prepubertal female rats ...
In the largest longitudinal study to date of electrical activity in the brains of sleeping adolescents, UC Davis scientists have discovered that the timing of brain maturation is associated with the timing of puberty. [en español]
Children. Preterm infants. Preterm infants may exceed 630 ng/dL, however, it is uncommon to see levels reach 1,000 ng/dL.. Term infants. 0-28 days: ,630 ng/dL. Levels fall from newborn (,630 ng/dL) to prepubertal gradually within 6 months.. Prepubertal males: ,110 ng/dL. Prepubertal females: ,100 ng/dL Adults. Males: ,220 ng/dL. Females. Follicular: ,80 ng/dL. Luteal: ,285 ng/dL. Postmenopausal: ,51 ng/dL. Note: For pregnancy reference ranges, see: Soldin OP, Guo T, Weiderpass E, et al: Steroid hormone levels in pregnancy and 1 year postpartum using isotope dilution tandem mass spectrometry. Fertil Steril 2005 Sept;84(3):701-710. ...
Principal Investigator:OKATANI Yuji, Project Period (FY):1997 - 1998, Research Category:Grant-in-Aid for Scientific Research (C), Section:一般, Research Field:Obstetrics and gynecology
There are plenty of websites out there who will offer this information but the trick is to find a website that is reputable and committed to giving the reader good accurate information. When you are on a website always click on the "Who We Are" tab to find out who is providing the information and who the site is sponsored by. TeenHealthFX.com is a great site for the exact purposes you are looking for. What makes TeenHealthFX even more unique is that there is no interaction between the site and its users. All answers to questions are posted to the site itself which provides complete anonymity for the question sender. Currently there are answers to almost 4,500 questions covering a wide variety of topics having to do with Adolescent Health. Another advantage of this approach is that the content is driven adolescents from all over the world who write in questions. Another great site that uses this format is "Go Ask Alice.". Here are some other good sites that TeenHealthFX would recommend:. WebMD - ...
Synonyms for prepubertal in Free Thesaurus. Antonyms for prepubertal. 1 synonym for prepubertal: prepubescent. What are synonyms for prepubertal?
Study Flashcards On Puberty at Cram.com. Quickly memorize the terms, phrases and much more. Cram.com makes it easy to get the grade you want!
Study Flashcards On Puberty at Cram.com. Quickly memorize the terms, phrases and much more. Cram.com makes it easy to get the grade you want!
Question - Spotting between period, severe itching in vulva, vaginal opening. Had thick dark white discharge. Reason? . Ask a Doctor about when and why Pap smear is advised, Ask an OBGYN, Gynecologic Oncology
This is the 3rd part of the video. This video explains male physiology which involves normal hypothalamic-pituitary-testicular axis, androgen physiology, sperm formation, and sexual maturation at...
Objectives were twofold: 1 ) to determine the chronology of development of dominant ovarian follicles during the peripubertal period in heifers and 2) to determine whether feeding a diet with low energy content that delays onset of puberty alters chronology of dominant ovarian follicular development in peripubertal heifers. Ten heifers of composite breeding ( 1/4 Angus, 1/4 Hereford, 1/4 Red Poll, 1/4 Pinzgauer) were randomly assigned, at 8 mo of age, to receive a diet designed to produce 0.9 (n = 5) or 0.3 (n = 5) kg body weight gain per day for the duration of the experiment. To characterize changes in size of ovarian follicles, real-time linear ultrasonography of ovaries was conducted in all heifers every other day until puberty occurred. Blood samples were collected weekly to determine concentrations of progesterone and 17β-estradiol. Determination of time of puberty was based on increased concentrations of progesterone, ultrasound depiction of ovulation, and subsequent presence of a corpus luteum.
The present study assessed if eating a diet of fish, spiked with persistent organic pollutants (POPs), affects gene and protein expression in the maturing mouse brain. Juvenile female Balb/c mice (22 days of age) were exposed for 28 days to fish-based diets spiked with the dioxin 2,3,7,8-tetrachlorodibenzodioxin (TCDD) or the non dioxin-like (NDL) chemicals hexabromocyclodocecane (HBCD), 2,24,4-tetrabromodiphenylether (BDE-47) or 2,24,4,5,5-hexachlorobiphenyl (CB-153) at doses approximating their respective lowest observed adverse effect levels (LOAEL). It was found that all POPs elicited changes in neural gene and protein expression profiles. Bioinformatic analysis of gene expression data highlighted the importance of the aryl hydrocarbon receptor (AHR) in dioxin toxicity and revealed that zinc regulation in the brain is targeted by TCDD through the AHR. Calcium homeostasis was affected by both TCDD and the NDL chemicals. In contrast to the transcriptomic analysis, the proteomics data did not
Around 15 percent of girls are going through puberty by age 7 -- and doctors cant explain why! According to a study of 1,239 girls, published in the journal Pediatrics, 15 percent of girls hit puberty by the age of 7, and the finding has doctors perplexed.
Kisspeptin, a peptide encoded by the Kiss1 gene, has been considered as a potential candidate for a factor triggering the onset of puberty, and its expression in the hypothalamus was found to increase during peripubertal period in rodent models. The present study aimed to clarify the oestrogenic reg
Going Through Puberty: A Boys Manual for Body, Mind, and Health Adolescence Childrens Nonfiction Ebook by Ruth Hickman, Md Hickman Ruth J., Ruth J. Hickman, Md Ruth J. Hickman,
Hi Im a 13yo turning 14yo male. Is this a sign of me going through puberty. When I masterbait I produce some liquid and I have a couple of hairs growing down there.
Diagnosis and conservative treatment of hormonal disorder in women during sexual maturation (costs for program #168925) ✔ Charite University Hospital Berlin ✔ Department of Pediatric Gastroenterology and Metabolic Medicine ✔ BookingHealth.com
Fascinating! This is consistent with the integral role of the timing of developmental processes in the development of phenotypic traits. There is resurgence in evolutionary biology (including within the neurosciences--which I discuss in my recent JevoHealth paper on play and human brain development) in recognizing the role of heterochrony (changes in timing of developmental processes in a descendant relative to its ancestors) in the evolution of new or altered traits. Evolution acts most powerfully through that which is easiest to change--which often turns out to be the timing of developmentally-programmed traits. If the modern world keeps up its leptinogenic environment, we may find the trait of early sexual maturity become canalized in our species. I wonder what the long-term consequences of this would be for human society and civilization. Sounds like a fascinating topic for a sci fi story, because it will take too many generations for the human species to lose its phenotypic plasticity in ...
As eagle cam watchers might recall, sucker fish rise in the spring and early summer to spawn on gravel beds and sand bars. Every year, Dad Decorah and Mr. North haul in suckers by the dozens once the run starts, sometimes bringing in more than one at a time! However, Longnose Sucker dont become sexually mature until they are between five and nine years of age, while White Sucker dont reach sexual maturity until they are three to eight years old. This means that spawning suckers are a minimum of three years old at spawning, and could easily be older. Finally, my large old bones make sense! Do we know that these fish are suckers? No - but age and size as determined by the opercular bones fit the species, especially given the presence of suckers as identified by local fishing guides, their age at sexual maturity, the amount of sand and gravel bars in the area, and the seeming preference of eagles for suckers when given the choice between suckers and, say, trout. Bob would love this, since he ...
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…
A tale from the history of human biology brings out the point. John Arbuthnot, an eighteenth-century British physician, noted a fact that greatly surprised him. Studying the registry of births in London between 1629 and 1710, he found that all of the years he reviewed showed a preponderance of male births: in his terms, each year was a "male year." If you were a mad devotee of mechanistic analysis, you might think of explaining this-"in principle"-by tracing the motions of individual cells, first sperm and eggs, then parts of growing embryos, and showing how the maleness of each year was produced. But there is a better explanation, one that shows the record to be no accident. Evolutionary theory predicts that for many, but not all, species, the equilibrium sex-ratio will be 1:1 at sexual maturity. If it deviates, natural selection will favor the underrepresented sex: if boys are less common, invest in sons and you are likely to have more grandchildren. This means that if one sex is more likely ...
Among many environmental factors, social factors, especially olfactory cues, can profoundly influence the timing of puberty onset. This is particularly well established in the house mouse (Mus...
London, Sep 9 (IANS) When young teenagers reach puberty, both girls and boys tend to experience a rapid drop in the number of calories that they burn, finds a new study. The research, that also explains the dramatic rise in childhood obesity in puberty, found that 15-year-olds use 400 to 500 fewer calories while at rest per day compared to when they were 10-years-old - a fall of around a quarter. This was particularly surprising as it is a period of rapid growth, and growth uses lots of calories, the researchers said.. However, by the age of 16, their calorie expenditure begins to climb once again. In addition, the study also found that teenagers exercise less during puberty, adding to the calorie excess that underlies obesity. This exercise drop is particularly stark in girls, whose activity level drops by around a third between the ages of seven and 16.. "When we looked for an explanation for the rising obesity in adolescence, we were surprised to find a dramatic and unexpected drop in the ...
Work Accomplished. The overall goal of this project is to develop a fundamental understanding of processes controlling marine mollusc reproductive maturation. In order accomplish this goal the specific research objectives of this proposal were to 1) characterize tissue specific transcriptomic resources for the geoduck and 2) identify proteins that play a role in geoduck reproductive maturation.. The first step in this project was collecting clams at different reproductive stages as determined through histological analysis. Gonadal tissue from 70 geoducks was sampled in batches of about eight per week over the span of two months from November 2014 to early January 2015. Hundreds of images were analyzed and reproductive status was determined for each individual.. Based on histological determination of reproductive maturational stage, seven female and six male paraffin-embedded gonad samples were selected for construction of RNA-seq libraries. A total of 443,468,476 reads were obtained and the de ...
Helpful, trusted answers from doctors: Dr. Goldenberg on height percentile boys: You reach puberty. Growth occurs through stage IV of sexual maturation in males & ceases in stage v, between 18-21 years of age. If youre concerned about short stature, consult your physician.
Adolescence begins with the biological changes accompanying puberty. More broadly speaking, however, puberty is used as a collective term to refer to all the physical changes that occur in the growing girl or boy as the individual passes from childhood into adulthood. Emotional Transition Biological changes usher in a phase of emotional transition during adolescence,…
ISBN 9780988449992 Puberty is an exciting yet challenging time for every boy. Respecting the universal yet unique experience of puberty for every boy, this book , also find 9780988449992 barcode , images and shopping info of ISBN 9780988449992
1 Answer - Posted in: crohns disease, delayed puberty, puberty, axiron - Answer: Im sorry but what do you mean by your manhood hasnt dropped? ...
Just like their female counterparts, male kitties go into puberty when they reach around 6 months of age. At this time, your little boy will become sexually mature and able to reproduce. Hell also ...
Will your son experience puberty six months to two years earlier than you expected? The newest research says yes. A study conducted by the American Ac...
If you are worried sick about your teenagers weight, heres the reason. When young teenagers reach puberty, both girls and boys tend to experience a rapid drop in the number of calories they burn, finds a new study. The research, that also explains the dramatic rise in childhood obesity in puberty, found that 15-year-olds use…
Hi all quick question, Dd is 9 in a few months and in my opinion seeming to be quite hormonal and now I think is the time for our girly chat. Would
The Saban Research Institute of the Childrens Hospital, Los Angeles found that the age when a child enters puberty is the primary influence on their bone
Lately it seems like my healthy staff has decided to go back to my younger years! Ive had involuntary spontaneous ejaculations! 4 over thos weekend. No urine, which would mea
Early Sexual Maturity and Milk Hormones - This archives is presented to assist our visitors in taking a pro-active part in their own health
Hi, Thank you for your query on Healthcare Magic. During pubertal period, testes will enlarge because of hormonal effect. And the size of both testes is not same even though they looks of same size. Left testes is usually lower in comparison to the right one. Testicular cancer is a very uncommon...
One can quote ad infinitum the achievements of women in sport over the past few decades. Public attention is being drawn to women athletes who have excelled in areas of specialisation. For every athlete who achieves national or international recognition, there are hundreds of women who are striving to work their way up the pyramid.
Dysmenorrhoea or menstrual pain normally occurs to women that have reach puberty and when they start to menstruate. However, not all women experiences menstrual pain. As me, myself, im starting experiences this dysmenorrhoea a few months after my first period. The pain started a few days before you menstruate. But the most painful day is the first day of menstruate. First of all, it feels like crampy pain in my lower abdomen especially in my stomach. then, the pain getting worst till i cant bear it at all. Cold sweat, shaking are my best friend when the dysmenorrhoea started. the best way to reduce the pain is taking pain killer or any medicine contain paracetamol. (usually we call it as panadol) ...
Sexual Maturity - Becoming Mature for Encounter - Earthly Maturity No period in human development shows such noticeable changes as puberty. Puberty means sexual maturity but one must broaden this definition if one wishes to understand the phase of...
I am extremely apologetic to the prepubescent individuals in the world, puberty is coming shortly for you all and although you may be excited you are in for a rude awakening for what it holds. I am equally apologetic to those that have passed through puberty and survived, because it does not end there. Second…
Children (,18 years old): LH reference ranges established on post-pubertal patient population. Reference range not established for pre-pubertal patients using this assay. For pre-pubertal patients, the Quest Diagnostics LH, Pediatrics assay is recommended (test code 36086).. ...