chorionic


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chorionic

 [kor″e-on´ik]
pertaining to the chorion.
chorionic villi numerous branching projections from the external surface of the chorion that provide for exchange between the maternal and fetal circulation. Oxygen and nutrients in the maternal blood diffuse through the walls of the villi and enter the blood of the embryo or fetus. Carbon dioxide and waste products diffuse from blood in the fetal capillaries through the walls of the villi into the maternal blood. See also chorionic villus sampling.

cho·ri·on·ic

(kō'rē-on'ik),
Relating to the chorion.

cho·ri·on·ic

(kōr'ē-on'ik)
Relating to the chorion.

chorionic

pertaining to the chorion.

chorionic girdle
a circular band of cells of placental origin that invade the endometrium and form the endometrial cups in the mare.
chorionic girdle cells
see chorionic girdle (above).
chorionic gonadotropin
a hormone with properties similar to those of luteinizing hormone; it is secreted in large amounts by the placenta during gestation. It stimulates the formation of interstitial cells in the testes of the fetus and causes the secretion of testosterone. It is found in substantial amounts in the urine of pregnant mares (pregnant mares serum gonadotropin—PMSG) and pregnant women (human chorionic gonadotropin—HCG). It is used as an aid in the treatments to induce ovulation and the synchronization of estrus.
chorionic somatomammotropin
see placental lactogen.
chorionic vesicle
the early embryonic vesicle before the allantois has developed and encircled the embryo to form the chorioallantoic vesicle and supplant it.
References in periodicals archive ?
The chorionic villi extracted were sent for DNA analysis to be done by the Department of Pathology at PNS Shifa Hospital Karachi for screening of Beta-thalassemia mutations by ARMS (Amplification Refractory Mutation System), which is based on polymerase reaction for common mutations.
Effect of human chorionic gonadotrophin on weight loss, hunger, and feeling of well-being.
Checking their findings against chorionic villus sampling, the researchers identified the mutations in the circulating fetal DNA with almost 100 percent accuracy.
In the late 1980s and early 1990s, there was just a hint of concern in the medical and scientific communities about the safety of chorionic villi sampling.
Chorionic villus sampling causes miscarriage about 1 percent of the time.
Ultrasonography and quantitative measurement of the [beta]-subunit of human chorionic gonadatropin ([bega]-HCG) have raised the expectation that early determination of fetal viability is possible.
An English study found that measuring human chorionic gonadotrophin was a much better test for detecting the presence of Down's syndrome than methods currently used -- measuring unconjugated estriol and alpha fetoprotein.
The Signature Precision Panel | Prenatal diagnostic test is available to clinicians through PerkinElmer's Signature Genomics Laboratories to analyze placental tissue or amniotic fluid, extracted during a pregnant woman's chorionic villus sampling (CVS) or amniocentesis procedures, to determine whether an abnormal number of chromosomes (aneuploidies) or small losses of chromosomes (microdeletions) are present during pregnancy.
Contract awarded for chorionic gonadotropin quantified reagent for the determination of.
Several studies have demonstrated the susceptibility of qualitative human chorionic gonadotropin (hCG) [1] measurement devices to false-negative results caused by high concentrations of hCG [beta] core fragment (hCG[beta]cf) (1-3).
Prenatal ultrasonography reveals an enlarged, thickened placenta with cystic spaces in the sub chorionic zone.