gonadotrophin


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Related to gonadotrophin: Gonadotropin deficiency, Gonadotropin releasing hormone

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

gonadotrophin

; gonadotropin hormone secreted by both sexes; promotes gonadal growth and function
  • anterior pituitary gonadotrophin pituitary gonadotrophic hormone of hypophyseal origin

  • chorionic gonadotrophin; CG; human chorionic gonadotrophin; hCG placental hormone, excreted in urine of pregnant women

gonadotrophin (gōnad´ōtrōf´in),

gonadotrophin

References in periodicals archive ?
Prolactin and gonadotrophin secretion in wild starlings (Sturnus vulgaris) during the annual cycle and in relation to nesting, incubation and rearing young.
The findings of embryonic quality in the Fx L genetic group found in this study showed little or no effect of FSH dose levels, rather the gonadotrophin used and that of the physiological condition of the experimental animals might influence on it (Figure 3).
Free {-subunit of human chorionic gonadotrophin in serum is a diagnostically sensitive marker of seminomatous testicular cancer.
With the availability of recombinant gonadotrophins, pregnancy has been achieved with newer treatment protocols, but the information about its outcome is scant (4).
Neuroendocrine regulation of gonadotrophin II release and gonadal growth in the goldfish, Carassius auratus.
The placenta is also a hormone factory pumping out hormones, such as human chorionic gonadotrophin (hCG), that are designed to support a healthy pregnancy.
Dr Andrew Scholey, senior lecturer in psychology at Northumbria University, said: "As you kiss, signals received by nerve endings in the lips are sent to the limbic system which releases hormones that tell the pituitary glands to produce gonadotrophin.
Neil Campbell has been banned from competition for a year and fined pounds 1,600 by the British Cycling Federation, but he insists the presence of human chorionic gonadotrophin (HCG) in samples is due to a medical condition.
The active substance in Decapeptyl[R] is triptorelin, a decapeptide analogue of GnRH (Gonadotrophin Releasing Hormone), a hormone secreted by the hypothalamus, which initially stimulates the release of pituitary gonadotrophins (hormones produced by the pituitary gland), which in turn control hormonal secretions by the testes and ovaries.
Limited Tenders are invited for Supply of Inj Serum Gonadotrophin (Pregnant MareS Serum) in Ampoule of 1000 I.
The beta-human chorionic gonadotrophin (hCG) level was 1 838 mIU/ml, urea and electrolyte levels were normal, and the haemoglobin and haematocrit levels were 9.