Why are some people more likely to develop blighted ovum than others?

Age and egg supply: Most blighted ovum pregnancies are genetically abnormal. Miscarriages increase as women get older, but low egg supply (diminished ovarian reserve) at any age increases the odds of miscarriage or genetically abnormal pregnancy. Rarely a woman or man has a genetic rearrangement (translocation) causing abnormal eggs or sperm. See a fertility md after 2 miscarriages if conceiving easily, sooner if not.

Genetic reasons: The ovum is formed with 22+ an x chromosomes(half number of 46 total). When combined with the sperms' 22 + x or y a complete fertilized ovum is ready for normal development. If the chromosome number is not correct then a "blighted ovum" and usually "miscarriage" occurs. Environmental exposure to toxins, marijuana or drug use can all cause chromosomal "breakage" resulting in the "blighted ovum".