Mid-pregnancy is usually characterized by an enlarged abdomen, fetal movement, as well as increased appetite and weight gain. 1. Abdominal enlargement. The bottom of the uterus exceeds the pelvis in mid-pregnancy, and as the fetus develops and grows, the pregnant woman can feel the enlarged uterus, plus the bottom of the uterus continues to rise, the abdomen will become bigger and bigger, presenting an obvious pregnant woman’s body shape. 2. Fetal movement. Generally in about 16-18 weeks of pregnancy can feel fetal movement, mid-pregnancy pregnant women can feel fetal movement, and with the development of the fetus fetal movement is more and more obvious. 3. Increased appetite. After 12 weeks of pregnancy, the early pregnancy reaction of pregnant women will gradually reduce, and in mid-pregnancy, with the accelerated development of the fetus, the nutritional needs of pregnant women will increase, appetite will also increase. 4. Weight gain. Fetal development in mid-pregnancy is relatively fast, pregnant women become bulky, with the abdomen increasing significantly pregnant women’s weight will also increase, we should pay attention to reasonable increase in nutrition, eat more high-protein foods.