gestational sac
nounUK /dʒesˈteɪʃənl sæk/
US /dʒesˈteɪʃənl sæk/
A small fluid-filled pouch in a mother's womb that holds a baby early in pregnancy.
The doctor saw the gestational sac on the ultrasound and said the pregnancy was just beginning.
RELATED WORDS
OTHER MEANINGS
2. A structure visible on an early ultrasound that confirms a pregnancy is inside the uterus.
An empty gestational sac can sometimes mean the pregnancy is very early or not developing.
3. The first clear sign of pregnancy that doctors look for during a scan.
The nurse pointed to the gestational sac as the first sign of the new baby.
4. A protective bubble of fluid that keeps the early baby safe and cushioned.
The gestational sac cushions the tiny embryo as it grows.