A miscarriage could be an emotionally shattering experience and couple often look for the causes of miscarriage. It could be caused by an abnormality in the chromosomes of the baby.In case of recurrent miscarriages, there could be a problem with the structure of the uterus or she could be inflicted with a blood clotting disorder.Uncontrolled diabetes during pregnancy and some hormonal factors can also be a cause of miscarriage. Collagen vascular disease and certain infections can also cause miscarriage.