Ovarian Cyst: A common cause of sharp pelvic pain in women, often related to ovulation or rupture of a cyst. The pain can be sudden and severe.

Ectopic Pregnancy: A pregnancy that develops outside the uterus, often causing sharp, stabbing pain on one side of the pelvis.
Appendicitis: Inflammation of the appendix, which can cause sharp pain that initially might be diffuse but often localizes to the lower right abdomen or pelvis.
Kidney Stones: Small, hard mineral deposits that can cause sharp, severe pain in the side or back, below the ribs, which can radiate to the pelvis.
Endometriosis: A condition where tissue similar to the lining inside the uterus grows outside of it, leading to sharp pain during menstruation, intercourse, or at any time.

Ruptured Ectopic Pregnancy: A life-threatening condition that requires immediate medical attention. The sharp pain can be accompanied by vaginal bleeding and signs of shock.
Ovarian Torsion: A condition where the ovary twists around its ligaments, cutting off blood supply. It causes severe, sharp pain and is a medical emergency.
Pelvic Fracture: A break in one or more of the bones that make up the pelvis, which can cause sharp pain, especially with movement.
Diverticulitis: Inflammation or infection of small pouches in the digestive tract, which can cause sharp pain in the lower left abdomen or pelvis.

Pelvic Inflammatory Disease (PID): An infection of the female reproductive organs that can cause sharp pain in the pelvis, especially during intercourse or urination.
Mittelschmerz: Mid-cycle pain related to ovulation, which can feel sharp but is usually mild and short-lived.
Intrauterine Device (IUD) Complications: Though rare, an IUD can cause sharp pain if it perforates the uterus or becomes embedded, requiring medical attention.
Pelvic Congestion Syndrome: A condition characterized by chronic pelvic pain associated with the presence of ovarian varices, which can cause sharp, aching pain.