In the third trimester of pregnancy, the belly is not obvious, and if the pregnant woman herself is thin, it is basically not visible. Because the pregnant woman’s uterus is the size of her fist at this time, the abdominal bulge is still not obvious from the appearance. In the third trimester, the fetus is 2-9 cm long and weighs 9-23 g. The cheeks, jaws, eyelids and ears have developed and taken shape, and the fetus has taken on a human form. In addition, the fetus’ fingers and toes are completely separated, and the eyes and fingers and toes are clearly distinguishable. Some of the bones begin to harden, and hair and nails grow out. The fetal brain grows in size at this time, taking up about half of the entire body. In addition, during the third trimester, the breasts are swollen and painful, and the nipples and areolas deepen in color. Therefore, pregnant women pay attention to wearing loose and comfortable clothes in order to avoid strangulation of the waist and abdomen too tight. At the same time, pregnant women may experience a gradual loss of vomiting and an increase in appetite. In addition, due to the influence of pelvic congestion and the continuous secretion of luteinizing hormone, pregnant women may have slightly more vaginal discharge than usual and may feel frequent urination, which are normal phenomena.