One month of pregnancy stomach pain, if it is caused by physiological reasons do not need special treatment, if it is caused by preeclampsia should be treated with fertility preservation, ectopic pregnancy caused by the need for timely treatment of medication or surgical treatment. 1. Physiological reasons: some pregnant women may have a slight pain in the lower abdomen when the fertilized egg is implanted, accompanied by a small amount of vaginal bleeding, usually lasts for 3~4 days, which is a physiological phenomenon and does not require any special treatment, and it can return to normal on its own. 2. Pre-eclampsia: It will cause paroxysmal lower abdominal pain, accompanied by a small amount of vaginal bleeding. After ultrasound examination clarifies the normal pregnancy, it should also be combined with progesterone and blood hCG (human chorionic gonadotropin) test to assist in the diagnosis. Need to pay attention to appropriate rest, and follow the doctor’s instructions to give progesterone and other drugs to protect the fetus treatment. 3. Ectopic pregnancy: it can cause pain in one side of the lower abdomen, accompanied by irregular vaginal bleeding, can be diagnosed by ultrasound, progesterone and blood hCG test to assist in the diagnosis, according to the condition of the active treatment, can be prescribed to give methotrexate to kill the embryo treatment, when there is internal bleeding, rupture of the ectopic pregnancy need timely surgical treatment. When pregnant with a month of stomach pains need to go to the hospital in time, under the guidance of the doctor to identify the cause, and actively deal with.