A pregnant woman with a bout of stomach pain, if it occurs before the 28th week of pregnancy, it may be preterm labor, if it occurs between the 28th and 37th weeks of pregnancy, it may be preterm labor, if it occurs after the 37th week of pregnancy, it may be preterm labor. Pregnant women with a bout of stomach pain need to be analyzed in relation to the time of occurrence of the symptoms. If it occurs before 28 weeks of pregnancy and is accompanied by vaginal bleeding, it is usually a preterm miscarriage. When it occurs between 28 and 37 weeks of pregnancy and contractions can be palpated, it is considered to be preterm labor with preterm labor, which needs to be judged in conjunction with ultrasound examination. After 37 weeks of pregnancy there are bouts of pain, at this time you need to see whether the redness is seen, usually the first sign of labor. When a pregnant woman has a pain in her stomach, regardless of the stage of pregnancy, she should consult a doctor in a timely manner, complete the examination, identify the cause of the disease, and then take appropriate treatment under the guidance of the doctor.