| gestational sac | <radiology> Arises from blastocyst which implants into secretory endometrium surrounded by echogenic trophoblast sac size: 6th week = 17mm;, 8th week = 31 mm, fills chorionic cavity by 12th week visualization of gestational sac, relative to beta-hCG levels: transabdominal scan: greater than 1800 IU/l, transvaginal scan: less than 500 IU/l = 20%, 500-1000 IU/l = 80%, greater than 1000 IU/l = 100%, relative to menstrual age, transabdominal scan: earliest by 5.5 weeks (10-12mm), transvaginal scan: routinely seen by 5-5.5 weeks see: double decidual sac (12 Dec 1998) |
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| gestational trophoblastic disease | (choriocarcinoma, molar pregnancy) a type of cancer associated with pregnancy in which a grape-like mole develops in the womb instead of a foetus. (16 Dec 1997) |
| gestin | Inclusive term used to denote any one of several gestagenic substances, which are usually steroid hormones. Synonym: gestin, progestin. (05 Mar 2000) |
| gestonorone caproate | <chemical> A long-acting potent progestogen structurally related to progesterone. Pharmacological action: progestational hormones, synthetic. Chemical name: 19-Norpregn-4-ene-3,20-dione, 17-((1-oxohexyl)oxy)- (12 Dec 1998) |
| gestosis | Any disorder of pregnancy. Origin: L. Gesto, to carry, to bear, + G. -osis, condition (05 Mar 2000) |
| gestosis, eph | Hypertensive state associated with oedema and proteinuria which develops during pregnancy up to the 20th week of gestation, after which it is classified as preeclampsia. (12 Dec 1998) |
| gestrinone | <chemical> A non-oestrogenic contraceptive which is a weak progestin with strong anti-progesterone properties. It is effective if used once a week orally or can also be used in intravaginal devices. Pharmacological action: contraceptives, oral, synthetic, progestational hormones, synthetic. Chemical name: 18,19-Dinorpregna-4,9,11-trien-20-yn-3-one, 13-ethyl-17-hydroxy-, (17alpha)- (12 Dec 1998) |
| gesture | 1. Any movement expressive of an idea, opinion, or emotion. 2. An act. Origin: L. Gestus, movement, gesture Suicide gesture, an apparent attempt at suicide by someone wishing to attract attention, gain sympathy, or achieve some goal other than self-destruction. (05 Mar 2000) |
| gestures | Movement of a part of the body for the purpose of communication. (12 Dec 1998) |