What is the harm of miscarriage twice a year?

Abortion twice a year, first of all, will cause their own resistance decline, so it is easy to appear vaginitis, cervicitis, pelvic inflammatory disease, appendicitis and other gynecological diseases. Secondly, there may also cause anemia, thin endometrium, endocrine disorders, irregular menstruation, serious cases may also appear secondary infertility, tubal blockage and so on.