Having a miscarriage does not necessarily mean that you have a fertility problem. Most of the time a miscarriage cannot be prevented and happens because the pregnancy is not normal. Possible causes for recurrent miscarriages include genetic defect, abnormally shaped uterus, uterine fibroids, hormonal problems, infections, immune system disorders, diabetes, increased age, habits such as smoking, caffeine and alcohol consumption. It is important that your doctor performs appropriate diagnostic tests to find out the cause for repeated miscarriages. You may wish to consult a fertility specialist who may be able to provide treatments that can improve your chances of a succesful pregnancy. Your primary care doctor should be able to provide you with a referral.