Gestational Sac

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.

Year introduced: 2011

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Tree Number(s): A16.535

MeSH Unique ID: D058746

Entry Terms:

• Gestational Sacs
• Sac, Gestational
• Sacs, Gestational
• Gestation Sac
• Gestation Sacs
• Sac, Gestation
• Sacs, Gestation

All MeSH Categories
Anatomy Category
Embryonic Structures
Gestational Sac