Factors Causing Recurrent Miscarriages A miscarriage is the spontaneous loss of pregnancy up to 20 weeks of conception. After that, it is considered still birth. The cause of miscarriages is usually unidentified. Probable factors include DNA deficiency, oddly shaped uterus, uterine fibroids (fibroids infertility), scar tissue (endometriosis infertility), hormonal imbalances (hormonal infertility) and sickness such […]