If you have pain in the left lower abdomen in early pregnancy, you can go to the hospital to first rule out whether it is a symptom of preterm miscarriage. If it is not a pre-eclampsia miscarriage, this pain is normal if mild. There will be a small amount of pain in early pregnancy, which will usually decrease or disappear gradually with the increase of pregnancy weeks. If it is not related to pregnancy, you can see a gastroenterologist, who will usually recommend an ultrasound. In early pregnancy when the stomach pain is not yet confirmed the location of the fetus in the bed and is accompanied by bleeding, this is usually when the gynecologist will perform an abdominal ultrasound on the mother. If the pregnancy is more than seven weeks old and the embryonic sac in the uterus is still not visible, coupled with abnormal bleeding, it is suspected that the pregnancy is ectopic. Further tests need to be done immediately to avoid life-threatening hemorrhage. Secondly, a birth control injection can also be given. After preterm miscarriage and ectopic pregnancy have been ruled out, stomach pain in early pregnancy accompanied by severe bleeding can be treated by a timely injection of birth control. Ultrasonography can also assist in screening for adnexal disease such as ovarian torsion.