Generally speaking, when a woman is 16 weeks pregnant, the uterus has already protruded from the pelvis into the abdominal cavity, and at this time, she has already begun to show her pregnancy. With the development of the fetus, women’s uterus gradually increase in size, women in 16 weeks of pregnancy, the uterus protrudes into the abdominal cavity, on the surface of the body to see, the abdomen has obvious bulge, at this time shows that has been pregnant. At 16 weeks of pregnancy belongs to the middle stage of pregnancy, the fetus has gradually appeared fetal movement, pregnant women should observe the fetal movement situation, to determine the health status of the fetus. If a woman is pregnant with two fetuses, then the time of pregnancy will be earlier. It is recommended that women do adequate checkups during pregnancy, such as fetal heartbeat monitoring and Down’s syndrome screening, in order to promote the normal development of the embryo and give birth to a healthy child in the future.