A variety of other conditions may cause repeated miscarriage. Abnormalities in the uterus — congenital problems that affect the structure of the uterus, uterine fibroids, polyps, and adhesions — are all associated with miscarriage.
Medical conditions can also increase the risk of miscarriage. Diabetes, polycystic ovary syndrome, hypothyroidism, and an autoimmune disorder called antiphospholipid syndrome represent some of the top medical causes.
In some cases, problems with the blood supply in the placenta lead to recurrent miscarriage.