At seven months of pregnancy, i.e. 28 weeks of gestation, the fetus weighs about 1 kg and is about 35 cm long. At 28 weeks of gestation, the fetus has little subcutaneous fat, the skin is pink in color and covered with thicker fetal fat, the fetus has good movement of the limbs and begins to have respiratory movements. After birth, the fetus can survive through careful treatment and management, but is prone to complications of prematurity, such as idiopathic respiratory distress syndrome. In late pregnancy, we should pay attention to increase the number of pregnancy check-ups, every two weeks, and count the fetal movements at home to sense the safety of the fetus in the womb.