| human 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) |
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| human chorionic gonadotropin | A human hormone made by chorionic cells (in the foetal part of the placenta), hcg is directed at the gonads and stimulates them. Hcg becomes detectable (by immunologic means) within days of fertilization and forms the foundation of the common pregnancy tests. The level of hcg in maternal serum also enters as one component in the double and the triple screens used during pregnancy to assign risks of down syndrome and other foetal disorders. (12 Dec 1998) |
| human chorionic somatomammotropic hormone | human placental lactogen |
| human chorionic somatomammotropin | human placental lactogen |
| human clinical trial | <pharmacology> Controlled clinical studies in human volunteers to test the safety and efficacy of pharmaceutical candidates. There are usually three distinct phases of human clinical testing: Phases I, II, and III. Phase I trials are safety studies of volunteers, usually healthy controls. Phase II trials are studies to confirm safety and study optimum dose and initial efficacy. Phase III trials are studies to prove safety and efficacy in a specific patient population. (14 Nov 1997) |
| human cytomegalovirus | <virology> A group of viruses within the subfamily Cytomegalovirus (Betaherpesvirinae) (of the family Herpesviridae) which infects human beings. (09 Oct 1997) |
| human development | Continuous sequential changes which occur in the physiological and psychological functions during the individual's life. (12 Dec 1998) |
| human diploid cell rabies vaccine | An iodinated virus vaccine used for protection against rabies vaccine usually prepared in the human diploid cell WI-38. Synonym: human diploid cell rabies vaccine. (05 Mar 2000) |
| human diploid cell vaccine | An iodinated virus vaccine used for protection against rabies vaccine usually prepared in the human diploid cell WI-38. Synonym: human diploid cell rabies vaccine. (05 Mar 2000) |
| human ecology | The relations of persons to their total (biologic and social) environment. (05 Mar 2000) |
| human ehrlichiosis | A form of ehrlichiosis that presents clinically as a undifferentiated acute febrile illness characterised by fever, chills, diarrhoea, and headache, following tick bite(s), probably by the Lone Star Tick, Amblyomma americanum. Caused by Ehrlichia chaffeensis. First described in 1987. (Thought to be predominantly a monocytic form of ehrlichiosis.) (05 Mar 2000) |
| human embryo lung cell | <cell culture> Diploid, untransformed cells from the lungs of human embryos which are used to make vaccines against certain viruses (such as rabies). (09 Oct 1997) |
| human engineering | The science of designing, building or equipping mechanical devices or artificial environments to the anthropometric, physiological, or psychological requirements of the people who will use them. (12 Dec 1998) |
| human fibrin foam | A dry artificial sponge of human fibrin prepared by clotting with thrombin a foam of a solution of human fibrinogen; the clotted foam is dried from the frozen state and heated; used as a topical anticoagulant. (05 Mar 2000) |
| human gamma globulin | A preparation of the proteins of liquid human plasma, containing the antibodies of normal adults; it is obtained from pooled liquid human plasma from a number of donors and may be prepared by precipitation with organic solvents under controlled conditions of pH, ionic strength, and temperature. Synonym: human normal immunoglobulin. (05 Mar 2000) |