Level 1: Reasons for spontaneous abortion in one month of pregnancy There are many reasons for spontaneous abortion in one month of pregnancy, the most common of which are abnormal embryonic development or maternal disease. Abnormal embryonic development in early pregnancy may lead to spontaneous miscarriage. In addition, maternal disease is also a common cause. , Endometriosis, fibroids, hyperthyroidism and other diseases may cause pregnancy failure. Level 2: Symptoms of spontaneous abortion in one month of pregnancy. Symptoms of spontaneous abortion in one month of pregnancy mainly include abdominal cramps, vaginal bleeding, etc. At this time, most women are not aware