The uterus belongs to the internal reproductive organs of women and is mainly divided into the body of the uterus and the cervix of the uterus, while the role of the uterus is mainly to nurture the fetus and produce menstruation. The uterus starts to develop from the embryo, and when the fetus is examined at about 24 weeks in the 4D ultrasound, the uterus can be seen inside the fetus. With the birth of the fetus, the endometrium may be affected by the mother’s hormones, which may lead to a small amount of vaginal bleeding in female babies, which is also a normal physiological manifestation. The ratio of the uterine body to the cervix is 1:2 in girls before puberty, but with the influence of hormonal stimulation in the body, the uterine body grows gradually, so that by the time they reach the reproductive age, the ratio of the uterine body to the cervix becomes 2:1. Each woman’s menstrual cycle starts around the age of 12 to 14, and once the menstrual cycle occurs, there is a cyclical peeling of the endometrial tissue and the discharge of eggs. Therefore, women have fertility functions at this time, but in the first two years of menstruation, the ovarian endocrine axis is not yet well developed, so anovulatory type of gonorrhea may often appear. For women of childbearing age, if the sperm and egg unite in the fallopian tube to form a fertilized egg, it will move to the uterine cavity with the peristalsis of the fallopian tube and grow and develop in the uterus, which is called the uterus to nurture a fetus.