At 22 weeks of pregnancy, a visible bulge can already be seen in the belly of the pregnant woman, and when lying down, the bottom of the uterus is located approximately at the position of the flat umbilicus. At 22 weeks of pregnancy, the pregnant woman has entered the mid-pregnancy stage, at this time the pregnant woman can already see a clear bulge in the abdomen when standing. When the pregnant woman is lying down, the bottom of the uterus can be touched at the flat umbilicus. At this time, the fetus has fully human shape, also have swallowing, urination and other movements, through the abdominal wall can hear the fetal heart. Pregnant women in the 22nd week of pregnancy can also feel the movement of the fetus by themselves, and through the change of fetal movement, they can understand the situation of the fetus in the uterus. Pregnant women should also strengthen nutrition during this period to provide a certain material basis for the normal growth and development of the fetus. At this time, it is also necessary to pay attention to the need to carry out three-dimensional or four-dimensional ultrasound to check whether the fetus has any structural deformities.