chorionic


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
Related to chorionic: chorionic gonadotropin, chorionic plate, chorionic sac, Chorionic cavity, Chorionic Villi Sampling

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 ?
Background" human chorionic gonadotropin in healthy, nonpregnant women.
Human chorionic gonadotropin induces neuronal differentiation of PC12 cells through activation of stably expressed lutropin choriogonadotropin receptor.
The preuterine pattern (PR) of chronic, hypoxic placental injury features, histologically, homogeneous placental maturation (ie, the chorionic villi are plump and of similar size from field to field); increased villous vascularity, including practically all cases of diffuse chorangiosis; decreased extracellular matrix of chorionic villi and villous cytotrophoblasts; increased Hofbauer cells; and increased nonapoptotic syncytial knotting (21,31) (Figure 2, A).
The mechanism behind the association between pregnancy hypertension and testicular cancer is unclear, but the findings may reflect a potentially protective effect of the altered pregnancy hormones such as human chorionic gonadotropin that occur in severe gestational hypertension and pre-eclampsia, say the authors.
Amniocentesis is associated with a one-in-two hundred incidence, and chorionic villus sampling with a one-in-one hundred incidence of abortion of the unborn child.
Both amniocentesis and another procedure called chorionic villus sampling, in which doctors pluck bits of the placenta, isolate fetal cells that can reveal many genetic problems in an unborn baby with near certainty.
Serum [beta]-human chorionic gonadotropin was negative.
1) Following the instructions in the package insert, researchers tested each brand six times with five concentrations of human chorionic gonadotropin (hCG), the hormone produced by the placenta that is an early indicator of pregnancy.
For NSGCTs, tumor markers may be followed; when tumor markers such as human chorionic gonadotropin or alpha-fetoprotein remain elevated, salvage chemotherapy is indicated.