The pain on both sides of the stomach in late pregnancy may be caused by physiological reasons, acute gastroenteritis and preterm labor. 1. Physiological reasons: after pregnancy, the enlarged fetus and uterus have a certain compression effect on the pelvic floor tissues, coupled with the uterus on the surrounding ligaments around the pull, will cause pain on both sides of the abdomen, not accompanied by contractions, is a normal physiological phenomenon. 2. Acute gastroenteritis: mostly caused by improper diet or unclean diet, can manifest as diarrhea, abdominal pain, nausea, vomiting, etc., can also cause pain on both sides of the stomach, combined with the history and clinical manifestations of easy diagnosis. 3. Pre-eclampsia: Irregular contractions in late pregnancy, with weak intensity, short duration, long and irregular intervals, mostly appearing at night and disappearing in the morning, can also cause pain on both sides of the stomach, which can be easily diagnosed by combining with the medical history and clinical manifestations. If you have pain on both sides of your stomach in late pregnancy, you can go to the hospital to find out the cause and get treatment.