In the female reproductive system, ova are produced in the ovaries, two small organs set in the pelvic cavity below and to either side of the bellybutton. The ovaries also secrete the hormones estrogen and progesterone. The estrogen hormone causes the thickening of the lining of the uterus and vagina in the early phase of the menstrual cycle. The estrogen hormone is also responsible for female secondary sex characteristics such as pubic hair and breasts, …showed first 75 words of 595 total…

…showed last 75 words of 595 total…and the sperm ejaculated from it during sexual intercourse. It also serves as an exit passageway for menstrual blood and for the baby during birth. The external genitals, or vulva, include the clitoris, erectile tissue that responds to sexual stimulation, and the labia, which are composed of elongated folds of skin. After birth the infant is fed with milk from the breasts, or mammary glands, which are also sometimes considered part of the reproductive system.