The depth from the mouth of the uterus to the fundus of the uterus is usually 6 to 7 cm, but due to the different ages, there are individual differences in the size of the uterus, which is not exactly the same for everyone. Under normal circumstances, the vagina is dilated with a vaginal speculum, the anterior lip of the cervix is clamped with a cervical forceps, and the depth of the uterine cavity is probed with a probe in the direction of the uterine position, i.e. the depth from the mouth of the uterus to the fundus of the uterus, which is normally 6 to 7 cm. The uterus is the place where embryos, fetuses, and menstruation are conceived, and it is an inverted pear shape that is slightly flattened in front and back, with a length of 7-8cm, a width of 4-5cm, a thickness of 2-3cm, and a capacity of 5ml. The size of the uterus is related to age and childbirth. During puberty, the uterus is underdeveloped, and women generally have a slightly larger uterus after giving birth, and the uterus gradually increases in size and softens during pregnancy, while it shrinks after menopause. Consultation with a medical professional is recommended for specific cases.