The reason why pregnant women belly thick, may be thicker abdominal fat, may also be caused by excessive weight gain, generally not caused by disease, pregnant women do not worry too much. 1, thicker abdominal fat: pregnancy abdomen is the most easy to grow fat parts of the pregnant woman in the pre-pregnancy abdominal fat may have been thicker, pregnant women need to provide adequate nutrients to the fetus during pregnancy, eating increased, excess nutrients may be converted to fat accumulation in the abdomen; 2, rapid weight gain: pregnant women eating too much during pregnancy, will lead to weight gain throughout the body, the increased weight will be distributed to all parts of the body, pregnant women usually have the same weight as the body. For fat accumulation in the abdomen, resulting in further thickening of abdominal fat thickness; 2, weight gain is too fast: pregnant women eating too much during pregnancy, will lead to an increase in body weight, increased weight will be distributed in all parts of the body, pregnant women usually may not care about the other parts of the body, only to notice the abdominal thickening of the belly. Therefore, during pregnancy, we need to pay attention to adjust the dietary structure, avoid eating too much sugary or greasy food, so as not to gain weight too quickly, appropriate consumption of fresh fruits and vegetables, moderate exercise, control weight gain, but also to promote gastrointestinal motility, reduce the occurrence of intestinal flatulence.