| equine gonadotropin unit | <veterinary> The specific gonadotropic activity of 0.25 mg of standard preparation of the gonadotropic principle of pregnant mares' serum. (05 Mar 2000) |
|---|---|
| chorionic | Referring to the chorion or membrane enclosing the foetus. (09 Oct 1997) |
| chorionic ectoderm | <embryology> Extra embryonic layer of epithelium that forms around the mammalian blastocyst and attaches the embryo to the uterus wall. Forms the outer layer of the chorion and together with maternal tissue will form the placenta. (18 Nov 1997) |
| chorionic epithelioma | An obsolete term for choriocarcinoma. (05 Mar 2000) |
| chorionic gonadotrophin | <hormone, tumour marker> A hormone that is produced by the developing placenta and by the fertilized egg after implantation in the uterine wall. This hormone is measured in the blood to determine pregnancy. Human chorionic gonadotrophin increases in quantity through the first trimester of pregnancy and begin to taper off after 85 days. Serum human chorionic gonadotrophin testing is accurate 48 hour post conception. Urine human chorionic gonadotrophin testing is a popular method of home pregnancy determination as human chorionic gonadotrophin can be detected in urine. Acronym: HCG (18 Nov 1997) |
| chorionic plate | That portion of the chorionic wall in the region of its uterine attachment; it consists of the mesoderm that lines the chorionic vesicle and, on the maternal side, of the trophoblast that lines the intervillous spaces; in the last half of gestation, the mesodermal connective tissue is largely replaced by fibrinoid material, and the amniotic membrane is adherent to the foetal side of the plate. (05 Mar 2000) |
| chorionic sac | 1. Protective membrane around the eggs of insects and fishes. 2. Extraembryonic membrane surrounding the embryo of amniote vertebrates. The outer epithelial layer of the chorion is derived from the tropoblast. (18 Nov 1997) |
| chorionic villi | <anatomy> The vascular projections from the chorion. (27 Sep 1997) |
| chorionic villi sampling | A method for diagnosis of foetal diseases by sampling the cells of the placental chorionic villi for DNA analysis, presence of bacteria, concentration of metabolites, etc. The advantage over amniocentesis is that the procedure can be carried out in the first trimester. (12 Dec 1998) |
| chorionic villus biopsy | Transcervical or transabdominal sampling of the chorionic villi for genetic analysis. (05 Mar 2000) |
| chorionic villus sampling | <procedure> A procedure for obtaining a sample of chorionic villi for the purpose of genetic testing, usually performed between 9 and 12th weeks of pregnancy. Amniocentesis testing has greatly supplanted the use of this form of genetic testing. (27 Sep 1997) |
| adenoviruses, human | Species of the genus mastadenovirus, causing a wide range of diseases in humans. Infections are mostly asymptomatic, but can be associated with diseases of the respiratory, ocular, and gastrointestinal systems. (12 Dec 1998) |
| adenovirus infections, human | Respiratory and conjunctival infections caused by 33 identified serotypes of human adenoviruses. (12 Dec 1998) |
| antigens, human platelet | Human alloantigens expressed only on platelets, specifically on platelet membrane glycoproteins. These platelet-specific antigens are immunogenic and can result in pathological reactions to transfusion therapy. (12 Dec 1998) |
| bites, human | Bites inflicted by humans. (12 Dec 1998) |