Level 1: Causes of pregnant women\’s defecation. Pregnant women\’s defecation refers to symptoms such as frequent urination, large amounts of urine, and burning sensation during urination during pregnancy. The main reason is that the enlargement compresses the bladder, resulting in a decrease in bladder filling, which stimulates the bladder nerves to reflexively cause urination. In addition, pregnant women\’s defecation may also be related to changes in hormonal levels during pregnancy. After pregnancy, estrogen and progesterone levels in a woman’s body