At 16 weeks of pregnancy, the fetus has developed to the point that hair has grown on the scalp and breathing movements have begun to appear, and some pregnant women can consciously feel the fetal movements. After pregnancy, with the increase of gestational weeks and fetal growth, fetal organs and systems will gradually develop, in 16 weeks of pregnancy, fetal length of about 16cm, weight of about 110g, the scalp has grown hair, and began to respiratory movements, fetal skin is thin and crimson, there is no subcutaneous fat, part of the pregnant woman at this time can be self-conscious of the fetal movement. At 16 weeks of pregnancy has reached the middle pregnancy, to follow the doctor’s advice to increase the appropriate protein, calcium, iron and a variety of vitamins and other nutrients such as food, such as meat, eggs, dairy products and poultry, fish, fresh vegetables and fruits, and so on. You can also ensure a moderate amount of exercise under the guidance of the doctor, in order to maintain an appropriate weight gain, which is conducive to natural delivery.