One of the causes of early miscarriage is a blighted ovum. This is a phenomenon where the egg has been fertilized but does not develop and there is no embryo. At this time, there is only a gestational sac in the uterus, and the embryo will not be able to attach and develop.

No embryo, also known as blighted ovum, is a condition in which a fertilized egg travels to the uterus but fails to develop into an embryo. This condition is usually caused by chromosomal abnormalities in the wife, the husband, or both spouses.