The normal uterus is 7~8cm long, 4~5cm wide, 2~3cm thick, and the cervix is 2.5~3.0cm long. Normal adult uterine cavity is inverted triangular, for a thick wall, small cavity, muscle-based organ, 7-8cm long, 4-5cm wide, 2-3cm thick, cervix 2.5-3.0cm long, the uterus weighs about 50g, the uterine cavity volume of about 5ml. The upper part of the uterus is wider, also known as the uterine body, and the lower part of the uterus is narrower and cylindrical, also known as the cervix, with a depth of about 6 cm. The ratio of the uterine body to the cervix in infancy is 1:2, the ratio in puberty is 1:1, and the ratio in the reproductive period is 2:1. After pregnancy, with the increase of gestational weeks, the uterus will gradually increase in size and become softer, the uterus volume at full term of pregnancy is normal up to 35cm x 25cm x 22cm, capacity of about 5,000ml, weight of about 1,100g, an increase of nearly 20 times, these are physiological changes, and there is no need for special treatment. The uterus is capable of maintaining menstruation, nurturing the fetus, and maintaining the stability of the organs, and any abnormalities found should be treated by a doctor in a timely manner.