Related Words

Chorion: The two-layered structure formed from the trophoblast after implantation; secretes human chorionic gonadotropin.

Chorionic Villus Sampling: An invasive prenatal diagnostic procedure involving removal of villi from the human chorion to obtain chromosomes and cell products for diagnosis of disorders in the human embryo.

Human Chorionic Gonadotropin (HCG): A peptide hormone secreted by the chorion that prolongs the life of the corpus luteum and prevents the breakdown of the uterine lining.

Chorionic Villi Sampling (CVS): A method of prenatal testing in which fetal cells from the fetal side of the placenta (chorionic villi) are extracted and analyzed for chromosomal and biochemical defects.

Deutovum: The resting, spiderlike stage following the shedding of the chorion of the egg: the second egg.

Prenatal Testing: Testing to detect the presence of a genetic disorder in an embryo or fetus; commonly done by amniocentesis or chorionic villi sampling.

Villi: Finger-like projections of the lining of the small intestine that increase the surface area available for absorption. Also, projections of the chorion that extend into cavities filled with m . . . View Full Definition