If the stomach pain is like menstrual cramps in early pregnancy, it means that the pain is more serious and not the slight pain caused by the developing fetus pulling the uterus, it is mostly considered as preterm miscarriage and ectopic pregnancy, pregnant women should immediately go to the hospital for examination to determine the cause and then deal with it. 1. Preterm miscarriage: In addition to stomach pain like menstrual cramps, pregnant women also have symptoms of vaginal bleeding and lower abdominal cramps, they need to undergo detailed examination to determine the blood HCG and progesterone The values of HCG and progesterone should be determined after detailed tests. If the progesterone value is low and the gestational sac is visible in the uterine cavity during ultrasound examination, the doctor may recommend fetal preservation treatment, such as the application of progesterone, during which the pregnant woman should pay attention to bed rest and avoid overexertion; 2. Ectopic pregnancy: If the pregnant woman’s stomach pain is like dysmenorrhea, which occurs in one side of the lower abdomen and is accompanied by irregular vaginal bleeding, she needs to seek medical attention immediately. Ectopic pregnancy is an obstetric emergency that may lead to hemorrhage and endanger the life of the pregnant woman. An ultrasound examination should be conducted immediately to determine the location of the pregnancy sac, and if it is outside the uterus, the diagnosis of ectopic pregnancy is confirmed. If the pregnancy is outside the uterus, it will be diagnosed as ectopic pregnancy. The pregnant woman will need to receive immediate treatment, with non-surgical treatment for milder symptoms and low bleeding, and surgical treatment for more dangerous cases, as determined by the doctor.