gonadotropin


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gonadotropin

[gō‚nad·ə′trō·pən]
(biochemistry)
A substance that acts to stimulate the gonads.
References in periodicals archive ?
There was no significant difference in most of the treatment variables between the two groups, except the total dose of gonadotropin, which was significantly higher in GnRH antagonist group (984 vs.
These included female and male age, body mass index (BMI), parity, duration, type (primary or secondary) and aetiology of infertility, cycle day 3 serum follicle stimulating hormone (FSH) and estradiol (E2) levels, antral follicle counts, the size of the largest dominant follicle, number of dominant follicles and the endometrial thickness at the time of human chorionic gonadotropin (hCG) injection, midluteal progesterone levels after IUI, pre- and post-wash total motile sperm count (TMSC), treatment protocol and IUI outcome.
The syndrome almost always occurs a few days after receiving human chorionic gonadotropin (hCG) (early OHSS), or later (late OHSS), which depends on the occurrence of endogenous hCG (1).
The onset of male puberty takes place when the hypothalamus begins to secrete gonadotropin releasing hormone (GnRH), which causes the pituitary to release luteinizing hormone (LH) and follicle stimulating hormone (FSH) that stimulate the growth of the testes.
5-7) Various gonadotropin preparations are commercially available and used for COH such as human menopausal gonadotropin (hMG), human-derived follicle-stimulating hormone (hFSH), and recombinant FSH (rFSH).
As a consequence, they promptly suppress pituitary gonadotropin secretion, which allows their use without the need for a desensitization period.
IHH is a rare genetic condition caused by a defective gonadotropin secretion from the anterior pituitary because of defective GnRH from the hypothalamus.
Patients underwent ovarian stimulation for up to four cycles with an injectable gonadotropin (Gn; n = 300), clomiphene citrate (n = 301), or letrozole (n = 299), followed by intrauterine insemination (IUI).
In a video interview, she talked about the study and why it has made her think twice about using very high doses of gonadotropins.
The reason for this is the inhibitory effect of increased estrogen levels in the circulation arising from the placenta on gonadotropin releasing hormone (GnRH) pulse generator and pituitary gonadotropins (1, 2).
The development of these tests, which are based on the detection of human chorionic gonadotropin (hCG) [2] in the urine, came 50 years after the discovery of hCG by Aschheim and Zondek (2) and after several centuries of descriptions of many other pregnancy tests.

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