gonadotropin


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Related to gonadotropin: chorionic gonadotropin, 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.

gonadotropin

/go·nado·tro·pin/ (-tro´pin) any hormone that stimulates the gonads, especially follicle-stimulating hormone and luteinizing hormone.
chorionic gonadotropin , human chorionic gonadotropin (HCG) (hCG) a glycopeptide hormone produced by the fetal placenta syncytiotrophoblasts that maintains the function of the corpus luteum during the first few weeks of pregnancy; the basis for most commonly used pregnancy tests. It is used pharmaceutically to treat certain cases of cryptorchidism and male infertility, to induce ovulation and pregnancy in certain infertile, anovulatory women, and to stimulate oocyte development and maturation in patients using assisted reproductive technologies. See also choriogonadotropin alfa.
human menopausal gonadotropin  (hMG) menotropins.

gonadotropin

(gō-năd′ə-trō′pĭn, -trŏp′ĭn) also

gonadotrophin

(-trō′fĭn, -trō′pĭn)
n.
A hormone that stimulates the growth and activity of the gonads, especially any of several pituitary hormones that stimulate the function of the ovaries and testes.

gonadotropin

[gō′nədōtrop′in]
Etymology: Gk, gone + trophe, nourishment
a hormonal substance that stimulates the function of the testes and the ovaries. The gonadotropic follicle-stimulating hormone and luteinizing hormone are produced and secreted by the anterior pituitary gland. In early pregnancy, human chorionic gonadotropin is produced by the placenta (basis for early pregnancy detection). It acts to sustain the function of the corpus luteum of the ovary, forestalling menstruation and thus maintaining pregnancy. Gonadotropins are prescribed to induce ovulation in infertility that is caused by inadequate stimulation of the ovary by endogenous gonadotropic hormones. Excessive stimulation of the ovary may result in vast enlargement of the gland, maturation of many follicles, multiple pregnancy, bleeding into the abdomen, and pain. While named for their effects on the ovaries, follicle-stimulating hormone and luteinizing hormone are also major gonadotropins in the testes, causing the Leydig cells to secrete testosterone and facilitating spermatogenesis. Also called gonadotrophin. gonadotropic, gonadotrophic, adj.

gonadotropin

Any of a family of protein hormones secreted by the pituitary, including follitropin (FSH), lutropin (LH) and (human) chorionic gonadotropin (hCG), which in concert regulate normal growth, sexual development and reproduction.

gonadotropin

Gonadotrophin Endocrinology A hormone that regulates ♂ and ♀ reproduction Examples LH and FSH, produced by the anterior pituitary, stimulate the ovaries or testicles to secrete progesterone, testosterone, estrogen; chorionic gonadotropin is produced by the placenta and drives secretion of progesterone and estrogen, which are critical for maintaining the placenta during gestation. See FSH, hCG, LH.

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

; 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

go·nad·o·tro·pin

, gonadotropic hormone (gō-nad'ō-trō'pin, -pik hōr'mōn)
1. A hormone capable of promoting gonadal growth and function.
2. Any hormone that stimulates gonadal function.

gonadotropin (gōnad´ōtrōp´in),

n (gonadotropic hormone) a gonad-stimulating hormone derived either from the pituitary gland (e.g., follicle-stimulating hormone FSH] and luteinizing hormone [LH], which is also an interstitial cell-stimulating hormone [ICSH]) or from the chorion (e.g., chorionic gonadotropin, which is found in the urine of pregnant women).
gonadotropin, chorionic,

gonadotropin

any hormone having a stimulating effect on the gonads. Two such hormones are secreted by the anterior pituitary: follicle-stimulating hormone and luteinizing hormone, both of which are active, but with differing effects, in the two sexes.

chorionic gonadotropin
a gonad-stimulating hormone produced by cytotrophoblastic cells of the placenta; used in treatment of underdevelopment of the gonads and to induce ovulation. See also pregnancy tests.
gonadotropin release inhibiting factor
pituitary hormone which inhibits the release of luteinizing hormone or follicle-stimulating hormone.
References in periodicals archive ?
Radioimmuno-assay of free [beta]-subunit of human chorionic gonadotropin in diagnosis of high-risk and low-risk gestational trophoblastic disease.
Hyperglycosylated human chorionic gonadotropin (HhCG) is a glycoprotein hormone secreted during embryonic implantation and trophoblast invasion of the uterine wall and is an early marker of pregnancy (1).
Adverse events associated with the use of Repronex are comparable to those experienced with other gonadotropins, including the risk of ovarian hyperstimulation.
Secretory rates of human chorionic gonadotropin by normal trophoblast.
However, Elonva will offer a new option for women, who have to go through the process of Assisted Reproductive Techniques, reducing the complexity and emotional burden that daily injections create by replacing 7 daily injections that gonadotropin requires, with one single injection," she stated.
Sertoli and Leydig cell numbers and gonadotropin receptors in rat testis from birth to puberty.
Use in women with different basal gonadotropin values in an in vitro fertilization program.
This "family of pens" is designed for self-administration of the liquid formulations of its three recombinant gonadotropins used in fertility treatments: GONAL-f[sup.
Cloning and tissue expression analysis of gonadotropin releasing hormone receptor from the brain of Japanese flounder, Paralichthys olivaceus.
Immunoassay of human chorionic gonadotropin, its free subunits, and metabolites.
Human chorionic gonadotropin is a glycopeptide secreted by the placenta.
Researchers working in endocrinology, genetics, investigative medicine, integrative physiology, and other fields in Europe, Brazil, and the US address the biology, pathophysiology, and mutations of genes for gonadotropins and their receptors; the processes of regulation of gonadotropin-releasing hormone and its dysfunction; the underlying causes of central hypogonadism; and animal models.

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