| pregnancy-specific beta 1-glycoprotein | A glycoprotein with the electrophoretic mobility of a beta-1 globulin. It is produced by the placental trophoblast and secreted into the maternal bloodstream during pregnancy. It can be detected 18 days after ovulation and its concentration in plasma rises steadily until, at the end of gestation, it reaches 200 mg/ml. It has been proposed as a measure of placental function for fertility control and is a candidate for an early pregnancy test. (12 Dec 1998) |
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| pregnane | Parent hydrocarbon of two series of steroids stemming from 5a-pregnane (originally allopregnane) and 5b-pregnane (17b-ethyletiocholane). 5b-Pregnane is the parent of the progesterones, pregnane alcohols, ketones, and several adrenocortical hormones and is found largely in urine as a metabolic product of 5b-pregnane compounds. For structure, see steroids. (05 Mar 2000) |
| pregnanediol | <chemical> Chemical name: Pregnanediol (12 Dec 1998) |
| pregnanedione | 5b-Pregnane-3,20-dione;a metabolite of progesterone, formed in relatively small quantities, that occurs in 5a and 5b isomeric forms. (05 Mar 2000) |
| pregnanediones | Pregnane derivatives in which two side-chain methyl groups or two methylene groups in the ring skeleton (or a combination thereof) have been oxidised to keto groups. (12 Dec 1998) |
| pregnanes | Saturated derivatives of the steroid pregnane. The 5-beta series includes progesterone and related hormones; the 5-alpha series includes forms generally excreted in the urine. (12 Dec 1998) |
| pregnanetriol | <chemical> Chemical name: Pregnanetriol (12 Dec 1998) |
| pregnanolone | <chemical> A pregnane found in the urine of pregnant women and sows. It has anaesthetic, hypnotic, and sedative properties. Chemical name: Pregnan-20-one, 3-hydroxy-, (3alpha,5beta)- (12 Dec 1998) |
| pregnant | 1. Being with young, as a female; having conceived; great with young; breeding; teeming; gravid; preparing to bring forth. 2. Heavy with important contents, significance, or issue; full of consequence or results; weighty; as, pregnant replies. " A pregnant argument." . " A pregnant brevity." 3. Full of promise; abounding in ability, resources, etc.; as, a pregnant youth. "Wherein the pregnant enemy does much." (Shak) Pregnant construction, one in which more is implied than is said; as, the beasts trembled forth from their dens, that is, came forth trembling with fright. Origin: L. Praegnans, -antis; prae = before + genere, gignere, to beget: cf. F. Pregnant. See Gender, 2d Kin. A pregnant woman. Source: Websters Dictionary (01 Mar 1998) |
| pregnant mare's serum gonadotropin | <veterinary> Formed by the equine placenta. Its activity in animals is similar to that of the follicle-stimulating hormone; relatively ineffective in human beings. Synonym: pregnant mare's serum gonadotropin. (05 Mar 2000) |
| pregnantly | In a pregnant manner; fruitfully; significantly. Source: Websters Dictionary (01 Mar 1998) |
| pregnatrienes | Pregnane derivatives containing three double bonds in the ring structures. (12 Dec 1998) |
| pregnene | An unsaturated steroid of primarily terminological importance; utilised in systematic nomenclature of appropriate 21-carbon steroids. (05 Mar 2000) |
| pregnenediones | Unsaturated pregnane derivatives containing two keto groups on side chains or ring structures. (12 Dec 1998) |
| pregnenes | Unsaturated derivatives of pregnanes. (12 Dec 1998) |