A blighted ovum happens when a fertilized egg attaches itself to the uterine wall, but the embryo does not develop. Cells develop to form the pregnancy sac, but not the embryo itself. In normal cases, ...

Answers from Yvonne Butler Tobah, M.D. A blighted ovum, also called an anembryonic pregnancy or anembryonic gestation, occurs when the early embryo stops developing, is resorbed and leaves an empty ...