What is the reasone for blighted ovum?

A blighted ovum, or anembryonic pregnancy, occurs when a fertilized egg implants in the uterus but does not develop into an embryo. This condition is often caused by chromosomal abnormalities in the fertilized egg, which prevent proper development. Other factors may include hormonal imbalances, uterine abnormalities, or maternal age. While the exact cause is not always identifiable, it is a common early pregnancy issue.