Constipation in early pregnancy is mainly caused by the influence of progesterone, improper diet and luteinizing hormone. 1. Progesterone influence: after pregnancy, the female body will secrete a large amount of progesterone, thus causing the gastrointestinal tract muscle tone significantly weakened, in this state, intestinal peristalsis will also be slowed down. With the increasing pressure of the fetus to the gastrointestinal tract, will also induce constipation. 2. Improper diet: After pregnancy, in order to meet the healthy growth of the fetus, women will consume too much diet. For example, high protein, high fat, high calorie food, it is easy to make the gastrointestinal tract fiber content is not enough, which is not conducive to intestinal peristalsis, ultimately causing constipation. 3. luteinizing hormone increase: luteinizing hormone in early pregnancy is significantly higher, it will make the uterus smooth muscle relaxation, resulting in weakened peristalsis, ultimately causing constipation. For the problem of constipation in early pregnancy, most are due to hormonal reasons. Pregnant women as long as the appropriate exercise, eat more fresh vegetables and fruits, or to coarse grains and coarse fiber foods, can effectively improve the situation of constipation. If constipation in early pregnancy is more serious, through exercise and dietary adjustments can not be effectively improved, you should go to the local hospital in a timely manner for relevant examinations, early detection of the problem as soon as possible treatment.