Compared with the unborn uterus, the uterus after a normal delivery differs mainly in terms of uterine size, uterine thickness and cervical opening pattern. 1. Uterine size: The uterus of a woman who has just given birth is on the large side, and then slowly shrinks to become smaller, returning to normal uterine size in about forty-two days. 2. Thickness of the uterus: The thickness of the uterus is between 3 and 5 centimeters in a woman who has never given birth, and the thickness of the uterus after a normal delivery is on the thinner side. 3. Cervical opening: The cervical opening of a woman after a normal delivery is usually transverse, while the normal cervical opening of a woman who has not given birth is rounded. Forty-two days after delivery, you should go to the hospital to check the recovery of the uterus and the birth canal, and pay close attention to any abnormal changes in your body, such as abnormal abdominal pain, abnormal discharge, fever, and so on, and go to the hospital in time to consult a doctor.