At 4 months of pregnancy, the fetus is about 16 centimeters long and weighs about 120 grams. At this time, the fetus\’s internal organs and other organs are getting closer to the completion stage, fully possessing the appearance of a human being, and men and women can be distinguished from the genitals. The fetal hair begins to grow, the bones and muscles gradually develop, the hands and feet can do slight activities, the heartbeat is active, and the heart sound can be measured with an ultrasonic stethoscope. By the time I was 4 months pregnant, the painful morning sickness had passed. Pregnant women will feel more comfortable and their appetite will begin to increase at this time. Frequent urination and constipation gradually returned to normal, but secretions remained unabated. At the end of 4 months, the placenta is complete and aborted