The uterus is an important reproductive organ of women.

The normal uterus is located in the center of the pelvis, adjacent to the bladder in front and close to the rectum in the back. It is located deep and its lower end extends into the vagina. The uterus is an important internal reproductive organ of women. It not only produces menstruation and nurtures the fetus, but also has complex endocrine functions.

From adolescence to menopause, the endometrium undergoes periodic changes under the influence of ovarian hormones and produces menstruation. During sexual intercourse, the uterus is a passage for sperm to reach the fallopian tubes; after pregnancy, the uterus becomes a place for embryo implantation and fetal development and growth; during childbirth, the uterus contracts to allow the fetus and its appendages to be delivered smoothly.

The uterus is not only an important internal reproductive organ, it also has complex endocrine functions. The uterus can secrete some hormones and enzymes, some of which can increase the sensitivity of the ovaries to pituitary gonadotropins, initiate follicular development and the selection of dominant follicles, and are one of the important factors in maintaining normal menstruation. In addition, the endometrium contains abundant receptors, which play an important role in the endocrine regulation of the hypothalamus-pituitary-ovary-uterus system.