gestational sac

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gestational sac

cystic structure of early pregnancy that represents the amnionic sac, fluid, and placenta.

gestational sac

a pouch containing the fetus in extrauterine gestation.

ges·ta·tion·al sac

(jes-tā'shŭn-ăl sak)
Cystic structure of early pregnancy that represents the amnionic sac, fluid, and placenta; in humans, the fused amnion and chorion.
References in periodicals archive ?
He said, "An established pregnancy will show one a change in the size of the uterus, a change in the thickness of the lining and presence of a gestation sac, an embryo with membranes, attached to the wall of the uterus and there will be changes also in the appearance of the ovaries.
Patients are selected for surgery if they are clinically unstable, if they have a large hemoperitoneum according to ultrasound, if an embryo with a heartbeat is visible within the gestation sac of the pregnancy, or if the ectopic mass is very large.
13] suggested the following criteria for early sonographic diagnosis of rudimentary horn pregnancy: (i) a pseudo-pattern of asymmetrical bicornuate uterus; (ii) absent visual continuity tissue surrounding the gestation sac and the uterine cervix; and (iii) presence of myometrial tissue surrounding the gestational sac.