Many mothers-to-be feel the phenomenon of bloating often during pregnancy, so why would this symptom occur? 1, the peristaltic and emptying function of the gastrointestinal tract is weakened after pregnancy, which is the main reason for the bloating of the stomach after pregnancy. The mother-to-be is always afraid that physical activity will affect the development of the baby, and often rests in bed, which also reduces the normal excretory function of the intestines and aggravates the symptoms of bloating. 3, after 4 months of pregnancy, due to the development of the baby, the mother’s uterus increases, and the enlarged uterus compresses the intestinal canal, making it difficult for the intestinal canal to move, which in turn aggravates the performance of bloating during pregnancy.