Why is my stomach uncomfortable after pregnancy?

60% of women will be pregnant 5 to 6 weeks began to show nausea, vomiting and other gastrointestinal reactions, known as early pregnancy reaction. Due to pregnancy, hormone levels in the body rose sharply, progesterone smooth muscle tension decreased, muscle relaxation, gastric sphincter relaxation, gastric acid content reflux to the lower esophagus to produce gastric burning, gastric emptying time prolonged, easy to show abdominal fullness. In addition, gallbladder emptying time is prolonged, bile is slightly viscous, causing cholestasis, easy to induce cholecystitis and cholelithiasis. Intestinal motility is weakened, feces stay in the large intestine for a long time, easy to show constipation. So, after pregnancy, I always feel uncomfortable in my stomach.