Empty Gestational Sac

An empty gestational sac is a cavity within a uterus that forms to house a pregnancy but the embryo has stopped growing.

This means that a fertilized egg was capable of implanting within the uterine wall to signal a pregnancy, but the embryo does not continue to develop and the pregnancy fails to progress. It is an early form of miscarriage.

An empty gestational sac is also referred to as a blighted ovum (considered to be an outdated term) or an anembryonic pregnancy.