Pregnancy is prone to constipation, pregnancy causes constipation for these main reasons: 1, when pregnant, patients are prone to control diet or selective eating in order to maintain the condition of the fetus, causing changes in dietary habits, which can easily cause constipation; 2, is after pregnancy, the amount of activity is reduced, not as much as the previous increase in activity, which is also a very important reason, when the amount of exercise is reduced, the general This is also a very important reason, when the amount of exercise is reduced, the general gastrointestinal peristalsis will also be significantly relieved; 3, is the pressure of the fetus, when the fetus gradually increased, the pressure on the gastrointestinal tract will gradually obvious, inhibit the peristalsis of the gastrointestinal tract, when the gastrointestinal tract peristalsis is inhibited, and then easy to appear constipation. The main reasons are these, so pregnant women should eat more vitamin-containing foods and fiber-containing foods during pregnancy, and must pay attention to drinking more water.