The possible causes and clinical significance of the symptoms of stomach pain in pregnant women are not exactly the same, depending on the location of the pain, accompanied by different clinical symptoms. I. If the symptoms of severe abdominal pain, accompanied by abnormal bleeding in the vagina, occur suddenly when you are about 40-50 days pregnant, it is highly suspected to be caused by ectopic pregnancy rupture. You should go to the obstetrics department of a regular public hospital as soon as possible and have an ultrasound examination to further clarify the diagnosis. If abnormal bleeding in the vagina occurs before the symptoms of lower abdominal pain and the symptoms of lower abdominal pain become paroxysmal, it is considered to be a symptom of pre-eclampsia miscarriage and should be given fetal preservation treatment after clear diagnosis. If paroxysmal pain around the navel occurs, accompanied by nausea, vomiting, diarrhea and other symptoms, it indicates that the pregnant woman may be suffering from acute gastroenteritis, and she should be given proper treatment according to medical advice after a clear diagnosis.