Diagnosis of one month of pregnancy with stomach pain and vaginal bleeding is considered a possible miscarriage. The way to preserve the fetus should be handled accordingly depending on the severity of the symptoms and signs of miscarriage. Relevant auxiliary examinations, such as ultrasonography, blood and urine HCG measurement, and progesterone measurement, should be perfected. If there is little vaginal bleeding, mild lower abdominal pain, no pregnancy discharge, the uterine opening is not open on internal examination, the ultrasound suggests that the uterine size is in line with the weeks of gestation, and the gestational sac in the uterine cavity is well-modeled, which belongs to the first sign of miscarriage. Foetus preservation as long as appropriate rest, prohibit sexual intercourse, strengthen nutrition, if the progesterone is low can be supplemented with progesterone, if hypothyroidism, can be oral small dose of thyroid tablets. After treatment, abdominal pain is relieved, bleeding is reduced or stopped, and the pregnancy can continue. If the vaginal bleeding is heavy, the lower abdominal pain is severe, although there is no pregnancy discharge, but the uterine cavity is dilated, and the ultrasound suggests that the intrauterine gestational sac has an abnormal morphology or is shifted to a lower position. In this case, miscarriage is unavoidable and there is no point in preserving the fetus, so it is necessary to perform curettage as soon as possible. Once a woman is diagnosed with pregnancy, she should avoid exposure to harmful environments, keep her mood happy, have a regular routine, and avoid sexual intercourse during the first three months of pregnancy. Once abdominal pain and vaginal bleeding and other symptoms of miscarriage need to consult a doctor.