Stomach bloating in early pregnancy is related to hormonal changes in pregnant women, uterine compression, diet and other factors. 1. Hormonal changes: estrogen, progesterone and HCG are elevated during pregnancy, which not only inhibit contractions and maintain fetal development, but also affect gastrointestinal peristalsis, leading to the manifestation of flatulence in pregnant women. 2. Uterine compression: As the fetus develops, the uterus will gradually increase in size. The enlarged uterus will compress the gastrointestinal tract, resulting in slowing down of bowel movements and symptoms of flatulence in pregnant women. 3. Diet: If a pregnant woman eats food that is not easy to digest, the food will ferment in the body, and it will be easy to produce flatulence. When bloating occurs in early pregnancy, pregnant women should pay attention to adjusting their diet, try to eat small meals and eat light, easy to digest food. If you are in good health, you can do appropriate activities to increase intestinal peristalsis and improve the symptoms of flatulence. If the symptoms are serious and affect the diet, pregnant women should seek timely medical treatment.