Embryonic Structure
gestational sac
Subclass of:
Embryonic Structures
Definitions related to 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.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2021
  • The sac that envelops the embryo. It is composed of extraembryonic membranes.
    NCI Thesaurus
    U.S. National Cancer Institute, 2021
Try this search on: Farlex, Merriam-Webster, Oxford Dictionary, or Wordnik

This content should not be used in place of medically-reviewed decision support reference material or professional medical advice. Some terms may have alternate or updated definitions not reflected in this set. The definitions on this page should not be considered complete or up to date.