| gestation | <obstetrics> The period of development of the young in viviparous animals, from the time of fertilization of the ovum until birth. Origin: L. Gestatio, from gestare = to bear (18 Nov 1997) |
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| gestation sac | The gestation sac is the fluid-filled sac in which the foetus develops, visible with an ultrasound exam. (09 Oct 1997) |
| multiple gestation | <radiology> Incidence: 1% of all births, twins in 1:85; triplets in 1:85x85; etc, uterus large for dates, may have elevated hCG, hPL, and aFP, at risk for IUGR: monochorionic-monoamniotic more than , monochorionic-diamniotic more than , dichorionic-diamniotic findings: 2 placentas indicate dichorionic-diamniotic, 1 placenta indicates monochorionic pregnancy or dichorionic pregnancy with fused placenta, separating membranes confirms diamniotic pregnancy (12 Dec 1998) |