Hematocolpos: A blood-filled VAGINA that is obstructed.Hymen: A thin fold of MUCOUS MEMBRANE situated at the orifice of the vagina.Hydrocolpos: A fluid-filled VAGINA that is obstructed.Pelvic Organ Prolapse: Abnormal descent of a pelvic organ resulting in the protrusion of the organ beyond its normal anatomical confines. Symptoms often include vaginal discomfort, DYSPAREUNIA; URINARY STRESS INCONTINENCE; and FECAL INCONTINENCE.Uterine Prolapse: Downward displacement of the UTERUS. It is classified in various degrees: in the first degree the UTERINE CERVIX is within the vaginal orifice; in the second degree the cervix is outside the orifice; in the third degree the entire uterus is outside the orifice.Gynecologic Surgical Procedures: Surgery performed on the female genitalia.Vagina: The genital canal in the female, extending from the UTERUS to the VULVA. (Stedman, 25th ed)Pelvic Floor: Soft tissue formed mainly by the pelvic diaphragm, which is composed of the two levator ani and two coccygeus muscles. The pelvic diaphragm lies just below the pelvic aperture (outlet) and separates the pelvic cavity from the PERINEUM. It extends between the PUBIC BONE anteriorly and the COCCYX posteriorly.