The time when the fetus grows hair is related to the physical condition of the pregnant woman and the development of the fetus, which is different for each individual. In clinical practice, some fetuses can start to grow hair in the fourth month of pregnancy, and by the sixth month of pregnancy, the fetus’ hair grows thicker except for the back of the head, which grows slower because the fetus is pressed during sleep. But the growth of each fetus and the physical quality of pregnant women are different, so the growth of each fetus hair is not necessarily, some fetuses will start to grow only after 6 months of pregnancy, are normal situation. After pregnancy, the diet should not only pay attention to eating high-protein food, but also pay attention to eating more vegetables and fruits, to achieve a balanced diet, a reasonable mix, and avoid foods high in oil, sugar and fat, so as to provide adequate nutritional conditions for the baby. In addition, patients should pay attention to rest and ensure sleep so as not to affect the baby’s development.