gonadotrophin


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gonadotropin

 [go´nah-do-tro″pin]
any hormone having a stimulating effect on the gonads. Two such hormones are secreted by the anterior pituitary gland: follicle-stimulating hormone and luteinizing hormone, both of which are active, but with differing effects, in the two sexes. Called also gonadotropic hormone.
chorionic gonadotropin (human chorionic gonadotropin (HCG) (hCG))
1. a glycopeptide hormone that is produced by cells of the fetal placenta and maintains the function of the corpus luteum during the first few weeks of pregnancy. It is thought to promote steroidogenesis in the fetoplacental unit and to stimulate fetal testicular secretion of testosterone. It can be detected by immunoassay in the maternal urine within days after fertilization; this provides the basis for the most commonly used pregnancy test.
2. the same principle obtained from the urine of pregnant women, used in treatment of certain cases of cryptorchidism and male hypogonadism, to induce ovulation and pregnancy in certain infertile, anovulatory women, and to increase the numbers of oocytes for patients attempting conception using assisted reproductive technologies such as gamete intrafallopian transfer or in vitro fertilization; administered intramuscularly. See also choriogonadotropin alfa.

go·nad·o·tro·pin

(gō'nad-ō-trō'pin, gon'ă-dō-),
1. A hormone capable of promoting gonadal growth and function; such effects, as exerted by a single hormone, are usually limited to discrete functions or histologic components of a gonad, such as stimulation of follicular growth or of androgen formation; most gonadotropins exert their effects in both genders, although the effect of a given gonadotropin will differ in males and females.
2. Any hormone that stimulates gonadal function.
3. Any substance that has the combined effects of follicle-stimulating hormone and luteinizing hormone.

go·nad·o·tro·pin

(gō-nad'ō-trō'pin)
1. A hormone capable of promoting gonadal growth and function; such effects, as exerted by a single hormone, usually are limited to discrete functions or histologic components of a gonad, such as stimulation of follicular growth or of androgen formation; most gonadotropins exert their effects in both sexes, although the effect of a given gonadotropin will differ in males and females.
Synonym(s): gonadotrophin.
2. Any hormone that stimulates gonadal function.
3. Any substance that has the combined effects of follicle-stimulating hormone and luteinizing hormone.

gonadotrophin

or

gonadotrophic hormones

hormones secreted by the anterior lobe of the PITUITARY GLAND and in some mammals, once pregnancy is under way, by the PLACENTA. FSH and LH are produced by all TETRAPODS though FSH appears to be absent in fish. LTH (Luteotrophin) is present in rats and maintains the CORPUS LUTEUM though it is absent in other mammals. Prolactin is present in some vertebrates and controls milk production (LTH is a form of prolactin). Pituitary output is controlled by the hypothalamus. Gonadotrophins influence other glands connected with reproduction, controlling the activity of the gonads, the onset of sexual maturity, OESTROUS CYCLES, breeding rhythms and LACTATION. See also HCG.

Gonadotrophin

Hormones that stimulate the ovary and testicles.
Mentioned in: Klinefelter Syndrome
References in periodicals archive ?
The use of this ratio in our study eliminates the confounding effect of different initial doses of gonadotrophin being used based on AFC, which allows more appropriate comparison of ovarian response.
Renzini et al., "Effect of different gonadotrophin priming on IVM of oocytes from women with normal ovaries: a prospective randomized study," Reproductive BioMedicine Online, vol.
Ratio of oestradiol concentration on the day of human chorionic gonadotrophin administration to mid-luteal oestradiol concentration is predictive of in-vitro fertilization outcome.
Prolactin and gonadotrophin secretion in wild starlings (Sturnus vulgaris) during the annual cycle and in relation to nesting, incubation and rearing young.
Cumulus cells have a role as a specific tool to transfer the signal transduction mechanism of gonadotrophin into the oocyte through the gap junction.
When alpha-fetoprotein (AFP), human chorionic gonadotrophin (hCG), and unconjugated estriol (uE3) are measured together, it's called a triple screen; when inhibin A is added, it's called a quad screen.
Currently being developed with the human rFSH, Roche's fully-automated Elecsys AMH test is intended to evaluate anti-Mullerian hormone (AMH) levels, which measure a woman's ovarian reserve, as well as her ovarian response to infertility treatment with gonadotrophin. Having this data, physicians will be better able to prescribe a personalised dose of the human rFSH, based on the woman's AMH level.
we do not claim that this experiment proves human chorionic gonadotrophin (HCG) causes regeneration of the spinal cord.
eCG injection commercially available as Serum Gonadotrophin (1000 IU) and PGF2a commercially sold as Cloprostenol Sodium Injection (0.2 mg) were purchased from Ningbo Sansheng Pharma chemicals, China.
He later realized that the pregnancy was ectopic after beta human chorionic gonadotrophin (beta-hCG) blood levels were abnormal.
Pregnancy tests usually detect beta human chorionic gonadotrophin or beta hCG, a hormone normally present to pregnant women due to the placenta that produces the same and circulates it through the blood, and eventually discharged through urine.
Females were superovulated by injection of 7.5 IU of pregnant mare serum gonadotrophin (PMSG--Folligon, Intervet) followed by 7.5 IU of human chorionic gonadotrophin (hCG--Chorulon, Intervet, Boxmeer, Holland) 48 hr later and mated with F1 (C57Bl10_CBA/H) males.