Is there something that could cause multiple miscarriages after already having one child?

Many possible causes of miscarriage exist. You have more chance of another success than multiple miscarriages with no child. With 2 or more miscarriages we look for low egg supply (diminished ovarian reserve), uterine problems like polyps or fibroids or an abnormally shaped uterus, abnormal antibodies in your blood and other immune system problems, blood clotting disorders, or hormonal problems. Rarely, infections may increase the risk of another miscarriage. Genetic tests can be performed on both partners if needed. See a Reproductive Endocrinology and Infertility (REI) specialist for testing and treatment to reduce the chances of another miscarriage.