human chorionic gonadotropin

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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.

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.

human chorionic gonadotropin

n. Abbr. HCG
A hormone produced by the placenta that maintains the corpus luteum during pregnancy.

human chorionic gonadotropin

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.

Patient discussion about human chorionic gonadotropin

Q. 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 gonadotropin
References in periodicals archive ?
In cohort 4 (CDX- 1307 with GM-CSF), 2 of 3 patients developed robust anti-Beta hCG immune responses after 2 doses and in one patient, the immune response was coincident with a normalization in serum Beta hCG.
In pregnancies with an unaffected female fetus, MSAFP has been reported to be significantly lower (3 percent) than in the presence of a male fetus; free beta hCG levels are higher (7 percent) if the fetus is female.
NTD offers laboratory developed and validated testing under the brand name UltraScreen(R), of which free Beta hCG is a vital component.
Maternal serum free beta hCG screening: results of studies including 480 cases of Down syndrome.
Provision of an analytical system for cardiac markers: BNP, troponin, myoglobin and CK mass and Beta HCG for Clinical Pathology Services Authority in Vallecamonica-Sebino of the AO Carlo Poma of Mantua and the AO Institutes Hospitallers in Cremona.
As a result, they commissioned laboratory testing that found beta HCG in the tetanus toxoid vaccine, despite conflicting assurances from Ministry of Health, they said.
Rs 350 are charged for BETA HCG test in BBH while the private laboratories are charging Rs 1000 for this test.
There are very few things in the body that produce beta hCG and testicular cancer is one of them," Dr.
Beta hCG is a hormone that is continuously released during gestation and is a continuous measurement between 0 and 300,000 mIU/ml (McPherson & Pincus, 2006), indicating the potentiality of pregnancy as shown in Table 1.
Confirm pregnancy -- This is because during pregnancy Beta HCG hormone levels are increased in urine and sometimes pregnancy may not be the only reason for this increase.
First trimester Down syndrome screening with dried blood spots using a dual analyte free beta hCG and PAPP-A immunofluorometric assay.
Serum beta HCG degerine bakilarak klinik oncesi donemde bile gebelik dislanabilir.