| 释义 |
human chorionic gonadotropin
human chorionic gonadotropinn. Abbr. HCG A hormone produced by the placenta that maintains the corpus luteum during pregnancy.hu′man chorion′ic gonadotro′pin
n. 1. a gonadotropic hormone that stimulates the production of estrogen and progesterone: its presence in blood or urine is an indication of pregnancy. 2. a commercial form of this substance, used in the treatment of testicular or ovarian disorders. Abbr.: hCG Thesaurus| Noun | 1. | human chorionic gonadotropin - hormone produced early in pregnancy by the placenta; detection in the urine and serum is the basis for one kind of pregnancy testHCG, human chorionic gonadotrophingonadotrophic hormone, gonadotrophin, gonadotropic hormone, gonadotropin - hormone secreted by the anterior pituitary gland and placenta; stimulates the gonads and controls reproductive activity |
human chorionic gonadotropin
human chorionic gonadotropin (HCG): see gonadotropic hormonegonadotropic hormone
or gonadotropin,
any one of three glycoprotein (see protein) hormones released by either the anterior pituitary gland or the placenta (the organ in which maternal and fetal blood exchange nutrients and waste products) that have various effects upon
..... Click the link for more information. .human chorionic gonadotropin[′hyü·mən kȯr·ē′än·ik gō‚nad·ə′trō·pən] (biochemistry) A gonadotropic and luteotropic hormone secreted by the chorionic vesicle. Abbreviated HCG. Also known as chorionic gonadotropin. human chorionic gonadotropin
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" >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 technologies" >assisted reproductive technologies such as transfer" >gamete intrafallopian transfer or fertilization" >in vitro fertilization; administered intramuscularly. See also choriogonadotropin alfa.cho·ri·on·ic go·nad·o·tro·pin (CG), a glycoprotein with a carbohydrate fraction composed of d-galactose and hexosamine, extracted from the urine of pregnant women and produced by the placental trophoblastic cells; its most important role appears to be stimulation, during the first trimester, of ovarian secretion of the estrogen and progesterone required for the integrity of conceptus; it appears to play no significant role in the last two trimesters of pregnancy, as the estrogen and progesterone are then formed by the placenta. CG has luteinizing hormone activity and exerts its actions through luteinizing hormone receptors. Synonym(s): β-HCG, choriogonadotropin, chorionic gonadotropic hormone, chorionic gonadotrophic hormone, placenta gonadotropin, placentagonadotropinhuman chorionic gonadotropinn. Abbr. HCG A hormone produced by the placenta that maintains the corpus luteum during pregnancy.human chorionic gonadotropin See hCG. cho·ri·on·ic go·nad·o·tro·pin (kōr'ē-on'ik gō-nad'ō-trō'pin) A glycoprotein with a carbohydrate fraction composed of d-galactose and hexosamine, produced by the placental trophoblastic cells; its most important role appears to be stimulation (during the first trimester) of ovarian secretion of the estrogen and progesterone required for the integrity of the conceptus; it appears to play no significant role in the last two trimesters of pregnancy, because the estrogen and progesterone are then formed by the placenta. Testing for the beta fraction of human chorionic gonadotropin is the basis for most serum and urine pregnancy tests.
Synonym(s): anterior pituitarylike hormone, chorionic gonadotropic hormone, chorionic gonadotrophic hormone. human chorionic gonadotropin (HCG) a gonadotrophic hormone secreted by the chorion of the PLACENTA (1) that has a similar effect to luteinizing hormone (see LH).Human chorionic gonadotropin (hCG)A hormone excreted during the development of an embryo or fetus.Mentioned in: Ectopic Pregnancy, Human Chorionic Gonadotropin Pregnancy Test, PregnancyPatient discussion about human chorionic gonadotropinQ. Does a slow rise in HCG hormone during pregnancy a condition to worry? My wife is in second trimester of pregnancy and had a HCG test, which shows fewer levels as compared to previous results. Does a slow rise in HCG hormone during pregnancy a condition to worry?A. When you have a hCG test in the start of pregnancy, the level of hCG in your blood must increase to double in 2-3 days. While the hCG doubling time will slow down from the mid of the first trimester and hCG level also begin to slowly reduce from 4th month onwards. Thus at this stage there is nothing to worry about, it is normal. More discussions about human chorionic gonadotropinAcronymsSeehardcore gamerhuman chorionic gonadotropin
Synonyms for human chorionic gonadotropinnoun hormone produced early in pregnancy by the placentaSynonyms- HCG
- human chorionic gonadotrophin
Related Words- gonadotrophic hormone
- gonadotrophin
- gonadotropic hormone
- gonadotropin
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