Gestational Sac
Synonyms
Gestation Sac
Gestation Sacs
Gestational Sacs
Sac, Gestation
Sac, Gestational
Sacs, Gestation
Sacs, Gestational
Round-shaped structure usually located in the upper fundus of the UTERUS in early pregnancy. It comprises EMBRYO; AMNIOTIC FLUID; and YOLK SAC. It is visible in PRENATAL ULTRASONOGRAPHY by the fifth week of pregnancy. Its size is often used to determine and monitor GESTATIONAL AGE; FETAL GROWTH; and PREGNANCY COMPLICATIONS.