Gonadotropins secreted by the pituitary or the placenta in horses. This term generally refers to the gonadotropins found in the pregnant mare serum, a rich source of equine CHORIONIC GONADOTROPIN; LUTEINIZING HORMONE; and FOLLICLE STIMULATING HORMONE. Unlike that in humans, the equine LUTEINIZING HORMONE, BETA SUBUNIT is identical to the equine choronic gonadotropin, beta. Equine gonadotropins prepared from pregnant mare serum are used in reproductive studies.

No data available that match "factor superovulation"


... human chorionic gonadotropin, assisted reproductive technology, superovulation, vascular endothelial growth factor, ... We assigned female mice to three groups: natural mating or mating following injection with equine chorionic gonadotropin and ... Superovulation with human chorionic gonadotropin (hCG) trigger and gonadotropin releasing hormone agonist (GnRHa) trigger ... Gonadotropin-releasing hormone agonists (GnRHa) are used as an alternative to human chorionic gonadotropin (hCG) to trigger ...
We assigned female mice to three groups: natural mating or mating following injection with equine chorionic gonadotropin and ... GnRHa is less potent at inducing ovarian vascular endothelial growth factor (VEGF), but may also affect endometrial ... Gonadotropin-releasing hormone agonists (GnRHa) are used as an alternative to human chorionic gonadotropin (hCG) to trigger ... In this study, we explore the effect of superovulation on endometrial angiogenesis during critical periods of gestation in a ...
Injection of equine chorionic gonadotropin (eCG; 100-500 IU) at the end of treatment increases synchronization of ovulation or ... among other factors. A high eCG dose is characterized by superovulation, low fertility, shortened estrous cycles, pregnancy ... During the nonbreeding season, a source of gonadotropin is also required. The most common gonadotropin used is eCG, ... Which of the following factors might compromise the quality of colostrum? ...
We also reported that equine chorionic gonadotropin (eCG) treatment to intact cyclic hamsters causes superovulation and high ... Regulation of inhibin subunit messenger ribonucleic acid levels by gonadotrophins, growth factors, and gonadotropin releasing ... Plasma concentrations of gonadotropins (Fig. 2). Fig. 2. Changes in plasma concentrations of (a) LH and (b) FSH of normal ... Inhibin is also well known as a key regulatory factor of FSH secretion. We also demonstrated the importance of inhibin on FSH ...
... were superovulated by injection with 0.1 mL of 5 IU equine chorionic gonadotropin (eCG) containing recombinant mouse BMP-6 at ... Therefore, this study investigated whether co-administration of BMP-6 during superovulation process improves ovarian response, ... oocyte quality and expression of Id-1 and vascular endothelial growth factor (VEGF) in the ovary of aged female using a mouse ... BMP-6 affect gonadotropin signals in granulosa cells and it promotes normal fertility by enabling appropriate response to LH ...
... equine chorionic gonadotropin; gene expression; genes; human chorionic gonadotropin; in vitro fertilization; kittens; lactic ... human chorionic gonadotropin; insemination; models; ovulation; probability; retrospective studies; sows; superovulation; ... In the current study we assess the role of vascular endothelial growth factor (VEGF) − 2578 A/C, and + 936 C/T polymorphisms in ... laparotomy, etc ; CRISPR-Cas systems; blastocyst; equine chorionic gonadotropin; estrus; gene editing; ...
225 ADDITION OF EQUINE CHORIONIC GONADOTROPIN TO A TRADITIONAL FOLLICLE STIMULATING HORMONE PROTOCOL FOR SUPEROVULATION OF BOS ... RDv24n1Ab6767 SUPPLEMENTATION WITH EPIDERMAL GROWTH FACTOR AND GLIAL CELL-DERIVED NEUROTROPIC FACTOR DURING PORCINE OOCYTE ... RDv24n1Ab1414 EQUINE CLONING AND EMBRYO AGGREGATION: EFFECT OF BOVINE, PORCINE, FELINE AND EQUINE OOPLAST. A. Gambini, J. ... RDv24n1Ab203203 EQUINE EMBRYO IN VITRO DEVELOPMENT AFTER INTRACYTOPLASMIC SPERM INJECTION FOLLOWED BY CHEMICAL ACTIVATION. J. ...
Superovulation in B6D2F1 mice (age 8-10 wk) was induced by injection of 5 international units of equine chorionic gonadotropin ... 46 and 47). As supported by the present study, identification of key oocyte reprogramming factors may be of prime importance ... Considerable interest has recently arisen in the factors present in oocyte cytoplasm that reprogram not only the sperm and egg ... Our results suggest that the murine demethylation process is facilitated either by a sperm-derived factor or by male pronuclear ...
While in pigs, equine chorionic gonadotropin is preferred. However, this is not commonly done in the swine industry because ... Superovulation is a technique used in order to have a female release more oocytes than normal. This can be achieved by using ... Another beneficial factor in cryoconservation of indigenous livestock is in terms of food security and economic development. ... Superovulation can be difficult because not all females will respond the same way and success will vary by species. Once the ...
Does progesterone or equine chorionic gonadotropin improve the superovulatory response and embryo quality in wood bison during ... Prentice, J.R., Singh, J., Dochi, O., et Anzar, M. (2011). « Factors affecting nuclear maturation, cleavage and embryo ... Superovulation and embryo collection in wood bison during the anovulatory season. », 38th Annual Conference of International ...
The objective of this study was to investigate the effect of equine chorionic gonadotropin (eCG) on ovarian follicles at three ... of messenger RNA encoding ovarian receptors for FSH and LH in cattle during superovulation with equine chorionic gonadotropin ... Goulding, D; Williams, DH; Rochei, JF and Boland, MP (1996). Factors affecting superovulations in heifers treated with PMSG. ... Equine chorionic gonadotropin and gonadotropin-releasing hormone enhance fertility in a norgestomet-based, timed artificial ...
... equine chorionic gonadotropin; estradiol; estrous cycle; freeze-thaw cycles; genetic improvement; in vitro fertilization; ... gonadotropin-releasing hormone; insulin; insulin-like growth factor I; metabolism; oocytes; oral administration; progesterone; ... We hypothesised that administration of PPG would have a positive effect on superovulation results via increased insulin and IGF ... 91 Can propylene glycol modulate insulin and insulin-like growth factor-1 in superovulated dairy heifers? ...
Mares do not superovulate in response to equine chorionic gonadotropin (eCG), and they do not respond well to follicle- ... the larger dose induces superovulation (average of three follicles). Cyclicity has also been induced in anestrous mares by ... Which of the following factors might compromise the quality of colostrum? ... by treatment with equine FSH (no longer commercially available in the USA). GnRH given at 2-20 mcg/hr (by infusion pump) ...
Cook N L, Squires E L, Ray B S et al (1993) Transvaginal ultrasound guided follicular aspiration of equine oocytes. J Equine ... Oocyte recovery from pre-ovulatory follicles is limited to one or two follicles per cycle; superovulation does not help, as ... Immature follicles need to be cultured in vitro with gonadotropins and have lower developmental rates than those obtained from ... but some other factor in those parts of the reproductive system is limiting fertility and the mares ability to either donate ...
Advances in recombinant gonadotropin production for use in bovine superovulation. Reprod Domest Anim. 2011;46:933-42.View ... Superovulation in mares using recombinant equine follicle stimulating hormone: ovulation rates, embryo retrieval, and hormone ... Wang M, Zhang Y, Li B, Zhu J. Construction of scFv that bind both fibronectin-binding protein A and clumping factor A of ... Legardinier S, Cahoreau C, Klett D, Combarnous Y. Involvement of equine chorionic gonadotropin (eCG) carbohydrate side chains ...
equine chorionic gonadotropin (eCG). a. activity. b. produced by.... c. clinical uses in cows ... c. superovulation protocols (compounded estrogens). d. enhance sexual receptivity of ovariectomized mares in semen collection ... What factor may cause gestation length in ruminants to dec. by 5-10 days? ... human chorionic gonadotropin (hCG). a. activity. b. clinical uses in cows. c. clinical uses in mares ...
Equine , Ovary , Ovum/cytology , Ovum , Ovum/metabolism , Superovulation , Superovulation/metabolism , Age Factors , Time ... Animals , Female , Mice , Dose-Response Relationship, Drug , Drug Administration Schedule , Gonadotropins, ... The best superovulation (a mean of about 21 eggs per female, range 12-45) was induced by the administration of 12 IU of PMSG ... Risk Factors , Rabies virus/classification , Rabies/transmission , Rabies/virology ...
Superovulation was induced in BDF1 females by injecting 5 IU equine chorionic gonadotropin, followed by a second injection of 5 ... Sex determination in mammalian germ cells: extrinsic versus intrinsic factors. Reproduction. 139:943-958. doi:10.1530/REP-10- ... 8 A). Crem, a gene encoding a "master" transcription factor for spermiogenesis (Blendy et al., 1996; Nantel et al., 1996), also ... We compared the localization of TDRD5-EGFP with that of other TDRD proteins and relevant factors in male germ cells. In fetal ...
Squires EL (April 1996). "Maturation and fertilization of equine oocytes". The Veterinary Clinics of North America. Equine ... Martín-Coello J, González R, Crespo C, Gomendio M, Roldan ER (October 2008). "Superovulation and in vitro oocyte maturation in ... Wang X, Tsai T, Qiao J, Zhang Z, Feng HL (June 2014). "Impact of gonadotropins on oocyte maturation, fertilisation and ... IVM is suboptimal and influenced by several factors. However, IVM is a milder approach to assisted reproduction treatment and ...
Equine , Ovary , Ovum/cytology , Ovum , Ovum/metabolism , Superovulation , Superovulation/metabolism , Age Factors , Time ... Animals , Female , Mice , Dose-Response Relationship, Drug , Drug Administration Schedule , Gonadotropins, ... The best superovulation (a mean of about 21 eggs per female, range 12-45) was induced by the administration of 12 IU of PMSG ...
... and equine chorionic gonadotropin (eCG) treatments by laparoscopy during breeding (September-November, n=12) and non-breeding ( ... Superovulation of dromedary camels with eCG: An effective and practical technique. Manjunatha, B M; Al-Hosni, Ali; Al-Bulushi, ... Many factors affect fertility status, including life-style choices such as cigarette smoking or alcohol use. The aim of this ... Gonadotropin-releasing hormone (GnRH) agonist versus control A cycle with GnRH agonist compared to without may improve LBR (OR ...
Equine pituitary gonadotropins (eLH, eFSH, eCG) are heterodimeric glycoprotein hormones with alpha (α) and beta (β) subunits. ... of pregnancy in mares during early gestation and fairly valuable for inducing superovulation in animals other than equines. The ... Shiga toxins belong to a family of structurally and functionally related toxins serving as the main virulence factors for ... Molecular characterization, modeling, in silico analysis of equine pituitary gonadotropin alpha subunit and docking interaction ...
... stimulating hormone associated with follicular development in cows induced to superovulate with equine chorionic gonadotropin. ... Analysis of factors influencing reproductive performance of the dairy cows by progesterone assay in milk fat. Br. Vet. J. 139: ... Inhibin immunization for increasing ovulation rate and superovulation. Theriogenology 41:3-17. https://doi.org/10.1016/S0093- ... inhibin levels and follicular development following treatment of buffalo with PMSG and Neutra-PMSG for superovulation. ...
... as females of these strains are poor responders to equine chorionic gonadotropin (eCG) stimulation, we examined the efficiency ... In the presence of glial cell line-derived neurotrophic factor, epidermal growth factor, basic fibroblast growth factor, and ... of superovulation by injecting anti-inhibin serum followed by human chorionic gonadotropin (hCG). About four to six times more ... Although glial cell line-derived neurotrophic factor (GDNF) has recently been identified as a self-renewal factor for ...
... followed by 10 IU human chorionic gonadotropin (hCG) IP 46 h later to synchronize ovulation. The animals were then injected ... such as FasL and that multiple endocrine factors work in concert to activate caspase-3-driven apoptosis during luteolysis. ... were given 10 IU equine chorionic gonadotropin (eCG) intraperitoneally (IP) ... were given 10 IU equine chorionic gonadotropin (eCG) intraperitoneally (IP) followed by 10 IU human chorionic gonadotropin (hCG ...
Effect of treatment at the end of lactation with the gonadotropin, Prolan-oil S, on oestrus and the size and weight of the ... Relations between gestation period and internal and external factors in a breeding herd of Swiss Brown cattle. Über Beziehungen ... An attempt to induce and synchronize ovulation and superovulation in dromedary camels for embryo transfer Études et Synthèses ... Water and electrolyte turnover in the equine athlete. Übersichten zur Tierernährung. *Mineral-contents in blood serum of dairy ...
Superovulation was induced with an intraperitoneal injection of 7.5 IU equine chorionic gonadotropin (eCG, Folligon, Intervet, ... insulin growth factor-1) and c-Met proto-oncogene. Igf-1 has been identified as an important factor for developmental growth [ ... Vitobello A, Ferretti E, Lampe X, Vilain N, Ducret S, Ori M, Spetz JF, Selleri L, Rijli FM: Hox and Pbx factors control ... Valero De Bernabe J, Soriano T, Albaladejo R, Juarranz M, Calle ME, Martinez D, Dominguez-Rojas V: Risk factors for low birth ...
The Use of Ceftiofur Sodium in the Extension and Cooled Storage of Equine Semen: Its Effects on Motion Characteristics, pH, and ... Puerperal Metritis in Dairy Cows: Risk Factors, Efficacy of Ceftiofur Therapy and Reproductive Efficiency ... Three-day Progesterone-priming Protocol for Synchronization and Superovulation of Goats During Transition ... Effects of a 200 µg Dose Canine Gonadotropin Releasing Hormone Vaccination on Mares ...
To directly assess the biological role of oligosaccharides in recombinant equine chorionic gonadotropin (rec-eCG) functioning, ... Table 1 Superovulation of mouse oocytes between natural-eCG and tethered rec-eCGβ/α deglycosylated mutants. Full size table. ... Finally, 1 IU was assumed to be 100 ng according to the conversion factor of the suggested assay protocol. ... Equine CG (eCG) is a unique member of the gonadotropin family because it exhibits both LH- and FSH-like activities in non-equid ...
Ovarian stimulation with human chorionic gonadotropin and equine chorionic gonadotropin affects prostacyclin and its receptor ... of the vascular endothelial growth factor receptor system in porcine oviducts after induction of ovulation and superovulation ... Expression of factors associated with apoptosis in the porcine corpus luteum throughout the luteal phase of the estrous cycle ...
  • Gonadotropin-releasing hormone agonists (GnRHa) are used as an alternative to human chorionic gonadotropin (hCG) to trigger ovulation and decrease the risk of ovarian hyperstimulation syndrome. (escholarship.org)
  • We assigned female mice to three groups: natural mating or mating following injection with equine chorionic gonadotropin and trigger with GnRHa or hCG trigger. (escholarship.org)
  • Superovulation in B6D2F1 mice (age 8-10 wk) was induced by injection of 5 international units of equine chorionic gonadotropin and 5 international units of human chorionic gonadotropin 48 h later. (pnas.org)
  • For ICSI into mouse metaphase II oocytes (17-19 h after human chorionic gonadotropin injection), frozen mouse, sheep, and bovine sperm were prepared by thawing briefly in a 37°C water bath, centrifuging for 2 min at 400 × g , and washing the pellet in 500 μl of PBS. (pnas.org)
  • The objective of this study was to investigate the effect of equine chorionic gonadotropin (eCG) on ovarian follicles at three stages of development (emergence, dominance and early static phases) during the first follicular wave (FFW) in Holstein heifers. (ac.ir)
  • The effect of administering equine chorionic gonadotropin (eCG) and human chorionic gonadotropin (hCG) post artificial insemination on fertility of lactating dairy cows. (ac.ir)
  • equine chorionic gonadotropin (eCG) a. activity b. produced by. (cram.com)
  • Wild-type (WT) or caspase -3 deficient female mice, 25-26 days old, were given 10 IU equine chorionic gonadotropin (eCG) intraperitoneally (IP) followed by 10 IU human chorionic gonadotropin (hCG) IP 46 h later to synchronize ovulation. (biomedcentral.com)
  • 1992. Changes in peripheral levels of bioactive and immunoreactive inhibin, estradiol- $17{\beta}$ , progesterone, luteinizing hormone and follicle stimulating hormone associated with follicular development in cows induced to superovulate with equine chorionic gonadotropin. (koreascience.or.kr)
  • To directly assess the biological role of oligosaccharides in recombinant equine chorionic gonadotropin (rec-eCG) functioning, cDNA encoding the full-length eCGβ-subunit was fused with the mature protein part of the α-subunit, and we examined the expression levels of deglycosylated eCG mutants, the ovulation rate for deglycosylated mutants in C57BL/6 mice. (biomedcentral.com)
  • Chorionic gonadotropin (CG) is a placental hormone that maintains the corpus luteum (CL) during pregnancy [ 1 ]. (biomedcentral.com)
  • An experiment was conducted to study the association between the single nucleotide polymorphisms (SNPs) in 5′-untranslated regions (5′-UTR) of equine chorionic gonadotropin ( eCG ) genes and the serum eCG levels. (ajas.info)
  • Equine chorionic gonadotropin (eCG) is a gonadotropic hormone produced in the chorion of pregnant mares, previously known as pregnant mare's serum gonadotropin, which was found in 40 to 130 days pregnant mare serum, first reported by Cole et al [ 1 ]. (ajas.info)
  • Ovulation induction protocol using equine chorionic gonadotropin and porcine luteinizing hormone in the weaned sow. (thefreedictionary.com)
  • equine chorionic gonadotropin in serum) as these methods are useful when examination by ultrasound ( per rectum or transabdominally) is not possible or feasible. (selectbreeders.com)
  • GnRHa is less potent at inducing ovarian vascular endothelial growth factor (VEGF), but may also affect endometrial angiogenesis and early placental development. (escholarship.org)
  • Levels of messenger RNAencoding ovarian receptors for FSH and LH in cattle during superovulation with equine chorionic gonadotrophin versus FSH. (freethesaurus.com)
  • 2017. Effects of FSH addition to an enriched medium containing insulin and EGF after long -term culture on functionality of equine ovarian biopsy tissue. (msstate.edu)
  • 2017. Equine ovarian tissue viability after cryopreservation and in vitro Culture. (msstate.edu)
  • The objective of the study was to reveal the factors associated with variable interval to ovulation following a single dose of prostaglandin F2α (PGF2) in Beetal goats. (usda.gov)
  • Oocytes collected from dominant follicles have already reached developmental competence following gonadotropin stimulation and only need to be cultured in vitro until the predicted time of ovulation. (vetstream.com)
  • The standard dose of eCG required to promote single ovulation generally ranges between 200 and 1000 IU, whereas the dose necessary to induce superovulation is approximately 2500 IU [ 17 ]. (biomedcentral.com)
  • Does supplemental LH changes rate and time to ovulation and embryo yield in Santa Ines ewes treated for superovulation with FSH plus eCG? (thefreedictionary.com)
  • Reproductive performance of anoestrous high-producing dairy cows improved by adding equine chorionic gonadotrophin to a progesterone-based oestrous synchronizing protocol. (ac.ir)
  • She received a total of 12 days of gonadotropin stimulation. (bvsalud.org)
  • The use of eCG in follicular stimulation and superovulation has substantial effects on follicular development and corpus luteum function [ 3 , 4 ]. (ajas.info)
  • Gonadotropins are heterodimeric glycoprotein hormones, consisting of dissimilar α- and β-subunits that are noncovalently complexed [ 2 ]. (biomedcentral.com)
  • The alpha subunit (eCGα) is the same as its counterparts of all other glycoprotein hormones (equine luteinizing hormone, equine follicle-stimulating hormone, equine thyroid stimulating hormone). (ajas.info)
  • Although Heape performed the first embryo transfer in rabbits in the 1890's, the revival of interest, initial transfers in species other than rabbits, and potential application of superovulation and embryo transfer to improve reproductive efficiency and enhance genetic selection were pioneered beginning in the 1930's by Warwick, Berry and Horlacher and later by Hammond, Rowson and Willett and others in goats, sheep and cattle [25]. (msu.edu)
  • Management factors associated with artificial insemination in the ewe can modify fertility. (intechopen.com)
  • Improved embryo yield and condition of donor ovaries in cows after PMSG superovulation with monoclonal anti-PMSG administered shortly after the preovulatory LH peak. (ac.ir)
  • These animals had much smaller ovaries, and a decreased response to superovulation with decreased numbers of transferable embryos recovered. (aeta.org)
  • Follicular development is directly under gonadotropins control, LH and FSH. (wikipedia.org)
  • A high eCG dose is characterized by superovulation, low fertility, shortened estrous cycles, pregnancy loss, and problems with multiple lambs or kids. (merckvetmanual.com)
  • oviduct or ovary, where the quality of the mare's oocyte is acceptable, but some other factor in those parts of the reproductive system is limiting fertility and the mare's ability to either donate an embryo, or to carry a foal to term herself. (vetstream.com)
  • In reproductive planning, intervals between lambings, season, age of ewe, heat stress, nutrition state or breed are some of the factors which have a great effect on fertility results. (intechopen.com)
  • Y. J. Huang and Z. Rosenwarks, "In vitro fertilization treatment and factors affecting fertility," Best Practice Research Clin Obstet Gynaetecol , vol. 26, no. 6, pp. 777-788, 2012. (hindawi.com)
  • Journal of Equine Veterinary Science 51:70-78. (msstate.edu)
  • Gonadotropic factors affecting the onset of reproductive. (ubc.ca)
  • The investigation was designed to determine, by means of differential adenohypophysial cell counts of gonadotropins and bioassay of adeno-hypophysial gonadotropins, the sequence of gonadotropic events which affect reproductive maturity in the female fur seal, Callorhinus ursinus. (ubc.ca)
  • It is believed that the main factors of low prenatal growth in mammals are genetic and environmental. (biomedcentral.com)
  • The bovine granulosa cell culture system developed in the present study can be used for the further studying the effects of hormones, growth factors and their interactions on bovine granulosa cells. (ubc.ca)
  • When considering common causes of infertility in the mare, the oviduct is one of the last places an equine reproductive specialist looks. (selectbreeders.com)
  • These use cAMP as an intracellular second messenger, with growth factors and cytokines also influencing their development in vivo. (wikipedia.org)
  • We hypothesize that PGF 2α initiates luteolysis in vivo , at least in part, by increasing the bioactivity or bioavailability of cytokines, such as FasL and that multiple endocrine factors work in concert to activate caspase -3-driven apoptosis during luteolysis. (biomedcentral.com)
  • En ese sentido, los ovocitos obtenidos son destinados a la producción in vitro de embriones durante un prolongado período. (docplayer.net)
  • In this study, we explore the effect of superovulation on endometrial angiogenesis during critical periods of gestation in a mouse model. (escholarship.org)
  • GnRHa and hCG triggers differentially disrupt the endometrial expression of key angiogenic factors during critical periods of mouse gestation. (escholarship.org)
  • eCG is secreted from binucleate trophoblastic cells in endometrial cups, into maternal blood plasma during the first half of equine gestation. (biomedcentral.com)
  • Results from previous studies have implicated so-called death receptor-activating cytokines, such as tumor necrosis factor α (TNFα) and Fas ligand (FasL), as being important mediators of PGF 2α -initiated luteolysis [ 4 - 6 ]. (biomedcentral.com)
  • Thus, eCG may be an ideal model for studying the structure-function relations of gonadotropins because it possesses properties of both its pituitary and placental counterparts [ 8 , 9 ]. (biomedcentral.com)
  • superovulation does not help, as aspiration of subsequent follicles can be difficult. (vetstream.com)
  • Insulin-like growth factor-I increased P₄ production from all categories of follicles. (ubc.ca)
  • Insulin-like growth factor-II inhibited P₄ production by granulosa cells from medium and large follicles (p (ubc.ca)
  • Changes in pulsatile secretion patterns of LH, FSH, progesterone, androstenedione and oestradiol in cows after superovulation with PMSG. (ac.ir)
  • The oocytes are then cultured in media containing nutrients important for oocyte survival, such as gonadotrophins, growth factors and steroids. (wikipedia.org)
  • Through a transcriptome analysis, we detected a different pattern of mRNA transcription in the liver at birth comparing male vs female and microsomic vs normal mice, noting some modifications in epigenetic regulatory genes in females and modifications in some growth factor genes in males. (biomedcentral.com)
  • 1) neonatal microsomia is not always a risk factor for adult metabolic syndrome, (2) neonatal non-genetic microsomia displays changes in the expression of important epigenetic genes and changes in liver mRNA transcription profile at birth, exaggerating sexual dimorphism, and (3) random preimplantation phenotypic variability could partially explain body birth weight variation in isogenic lines. (biomedcentral.com)
  • using a joint model combining two main traits, one relative to female and the other relative to the male, reported that the main variation factors of AI success were relative to non-sex-specific effects and to female effect, suggesting that choosing females to inseminate might slightly improve the AI results. (intechopen.com)
  • the evidence is commensurate with the results of the differential adenohypophysial cell counts of gonadotrops, and suggests minimal gonadotropin release among immature females, and the release of ovulatory amounts of FSH among estrous females. (ubc.ca)
  • 2017. Utilization of social media as a marketing tool for equine businesses: An exploratorystudy. (msstate.edu)
  • Cyclic adenosine monophosphate response element modulator (CREM) and TRF2, key transcription factors for spermiogenesis, are expressed in Tdrd5 -deficient round spermatids, but their targets, including Prm1 / Prm2 / Tnp1 , are severely down-regulated, which indicates the importance of IMC/CB-mediated regulation for postmeiotic gene expression. (rupress.org)
  • C mutation causes appearance of the specific binding site of hepatocyte nuclear factor 3 forkhead homolog 2 (HFH-2), which is a transcriptional repressor belonging to the forkhead protein family of transcription factors. (ajas.info)
  • Effects of follicle-stimulating hormone (FSH), luteinizing hormone (LH), insulin-like growth factor-I (IGF-I), and insulin-like growth factor-II (IGF-II) on steroid production by bovine granulosa cells were determined. (ubc.ca)
  • Breeds, maternal and paternal effects, and fetal genders are the main genetic factors which influence the eCG secretion. (ajas.info)
  • Previous studies showed that the breed factor has a great influence on the secretion level of eCG. (ajas.info)
  • Seasonal variations are described as a limiting factor in sheep reproduction. (intechopen.com)
  • This is a new and valuable tool to manage superovulations. (aeta.org)
  • In this case normalization of gastrin levels did not prevent the development of multiple gastric carcinoids in the fundic mucosa, suggesting that factors other than gastrin are of importance in the pathogenesis. (pianolarge.cf)
  • Attempts by several studies have been made to identify the risk factors for the development of endometriosis. (glowm.com)
  • In the equine breeding industry, many different assisted reproduction techniques (ARTs) are widely used to aid the management of equine reproduction. (selectbreeders.com)
  • AMH is a glycoprotein hormone and it is a member of the transforming growth factor-beta group. (aeta.org)
  • During the nonbreeding season, a source of gonadotropin is also required. (merckvetmanual.com)
  • Our results suggest that the murine demethylation process is facilitated either by a sperm-derived factor or by male pronuclear chromatin composition. (pnas.org)
  • however, hormonal superstimulation using exogenous gonadotropins brought better results. (jbra.com.br)
  • What are some factors that cause inability to copulate in males? (cram.com)