36 weeks of pregnancy has entered the late pregnancy, the situation of stomach pain and want to defecate, may be the gastrointestinal discomfort or premature delivery of the precursor performance: 1, gastrointestinal disorders: if eating unclean food or stimulated by cold, may be in the 36th week of pregnancy, abdominal pain, want to defecate symptoms. Therefore, pregnant women should keep their food clean and hygienic during pregnancy, pay more attention to abdominal warmth, and apply anti-diarrheal and gastrointestinal flora drugs to relieve symptoms when diarrhea occurs; 2, preterm labor: 36 weeks of pregnancy is close to full-term pregnancy, and if the uterus contraction process is accompanied by fetal head descent, it will cause pressure on the rectum and cause defecation reaction. You should go to the obstetrics department of the hospital in time to determine whether there are true contractions and fetal head drop through fetal heart monitoring, ultrasound and gynecological examination. Since the fetus is not fully developed at 36 weeks, it usually needs to be treated with fetal preservation drugs, which can be taken intravenously or orally to inhibit smooth muscle contraction and relieve pain caused by uterine convulsions and contractions, so as to achieve fetal preservation. In addition, it is important to pay attention to bed rest and avoid strenuous activities to avoid aggravating uterine contractions and increasing the chances of preterm delivery.