The uterus is the place where the fetus is conceived, where the fertilized egg is implanted and gradually grows into a mature fetus. After full term, the uterus contracts and gives birth to a fetus. During the period from adolescence to menopause, if a woman is not pregnant, the endometrium will periodically change and fall off under the action of ovarian hormones, resulting in menstruation. The fallopian tube has the function of transporting sperm and eggs, and it is also the place where sperm and eggs meet and fertilize. After fertilization, the pregnant egg is transported to the uterine cavity through the fallopian tube for implantation. Ovary is a female gonad organ with many follicles, which can produce and expel eggs, secrete sex hormones, and maintain women's unique physiological functions and secondary sexual characteristics. After menopause, the ovaries gradually shrink.