Which ligament forms the outer surface of the uterus (perimetrium)?

• A. The broad ligament
• B. The suspensory ligament
• C. The round ligament
• D. The ovarian ligament

Answer: (D)

The outer surface of the uterus is the perimetrium, the serous coating formed by peritoneum. The broad ligament is a large double fold of peritoneum that drapes over the uterus and other pelvic structures, providing the peritoneal covering that becomes the perimetrium. The other ligaments have different roles: the suspensory ligament anchors the ovary to the lateral pelvic wall and carries vessels; the round ligament helps maintain the uterus’ position but does not form the peritoneal coating; the ovarian ligament connects the ovary to the uterus but does not contribute to the uterine surface. So the broad ligament is the structure that forms the outer surface of the uterus.