A bout of stomach soreness at 39+4 weeks of pregnancy may be caused by stretching of the uterine ligaments due to uterine enlargement, gastrointestinal problems, overwork during pregnancy, and false contractions. 1. Uterine ligament stretching: as the fetus grows and develops, the uterus gradually increases in size, pelvic congestion, ligament stretching may lead to abdominal soreness and bloating, which can be gradually relieved after resting, which is a normal phenomenon. 2. Gastrointestinal problems: As the uterus enlarges, it may compress the stomach and move it upward, which in turn may cause decreased gastric tone, weakened peristalsis, delayed emptying, decreased secretion of gastric acid, and relaxation of the gastric sphincter, which will make the pregnant woman feel bloated and achy in the abdomen. 3. Overwork: During pregnancy, pregnant women fail to get enough rest and overactivity may cause excessive contraction of abdominal muscles, resulting in abdominal distension and soreness. 4. False contractions: at 39+4 weeks of pregnancy, there may be irregular abdominal pain, weak intensity, long intervals, short duration, not accompanied by other uncomfortable symptoms may be false contractions. If pregnant women appear 39 + 4 weeks pregnant stomach a burst of soreness, it is recommended that timely medical attention, under the guidance of the doctor, improve the relevant examination, clear cause, symptomatic treatment.