The female reproductive system consists of external and internal organs. The internal organs include ovaries that produce eggs and hormones, uterine tubes that carry eggs from the ovaries to the uterus, a uterus that supports pregnancy, and a vagina that allows for sexual intercourse and childbirth. The external genital organs include the vulva and breasts. The ovaries, uterus, and vagina undergo monthly changes during the menstrual cycle in response to hormones like estrogen and progesterone.