The size of a woman’s uterus varies throughout her life due to the influence of ovarian hormones, the number of pregnancies and childbirths, and her age.
The uterus during the newborn period is about 1/3 the size of an adult, with a length of only 2.5 to 3.0 cm. As age increases and the ovaries develop, the reproductive system gradually matures, and the uterus increases. In adulthood, the uterus of a person who has not given birth is 6 to 8 centimeters in size; the uterus after pregnancy and childbirth becomes larger due to the proliferation of muscle fibers. Therefore, the uterus of a person who has given birth is larger than the uterus of a person who has not given birth. The number of births is also related to the size of the uterus. The uterus of a woman with more births is larger. But this increase is not constant. For example, in women who breastfeed for a long time after childbirth, the uterus will shrink and become smaller due to the influence of sex hormones. As we age and reach menopause, ovarian function declines, causing the myometrium and endometrium to atrophy, and the size of the uterus becomes smaller. Therefore, the uterus changes throughout a woman\’s life. In addition to changes in the size of the uterus, there are also differences in the ratio of the uterus to the cervix and the shape of the uterus. In infancy, the uterine body is shorter than the cervix, accounting for only half of the cervix; in adult women, the uterine body is twice as long as the cervix.
The uterine body of nulliparous women is triangular and the cervix is fusiform; the anterior and posterior cervix of the uterus of multiparous women is enlarged, and the triangle of the uterine cavity becomes less obvious.
This article is provided by Baidu Reading and is excerpted from \”The Clear \”Conception\” Plan\” Author: Sun Jianqiu and Xie Yingbiao