The female reproductive organs are the ovaries, fallopian tubes, uterus, cervix, vagina, and vulva. Since the combined primary function of these organs is reproduction, disorders affecting them can result in infertility and should be treated as soon as possible, particularly if children are planned. Such disorders may be caused by infections, physical damage, or hormonal imbalances. The first two articles in this section discuss pelvic inflammatory disease and endometriosis, disorders that may affect more than one female reproductive organ. The next articles discuss disorders of the ovaries, uterus, and cervix. Disorders affecting the vagina and vulva are covered last. Disorders affecting the female reproductive organs are common, but many of them can be treated easily. Disorders affecting menstruation, the menopause, or sexual development are covered in other sections (see Menstrual, menopausal, and hormonal problems), as are sexual disorders of both sexes (see Sexually transmitted infections, Infertility, and Sexual problems).