Pubis

The pubis, or pubic bone, is the anterior and inferior part of each hip bone. It is one of the three bones that form the hip bone, together with the ilium and ischium. These bones begin as separate structures but fuse during development, with all three contributing to the acetabulum, the socket of the hip joint .¹

The pubis consists of a body, a superior ramus, and an inferior ramus. The superior ramus extends toward the acetabulum and contributes to its formation. The inferior ramus extends downward and laterally to join the ramus of the ischium. Together, portions of the pubis and ischium form much of the boundary of the obturator foramen, a large opening in each hip bone .¹

At the front of the pelvis, the bodies of the left and right pubic bones meet at the pubic symphysis. This is a cartilaginous joint in which the opposing pubic surfaces are joined through a fibrocartilaginous disc. The pubic bones therefore help complete the pelvic ring anteriorly .¹

The pubis should not be confused with the entire pelvis or hip bone. It is specifically one component of the hip bone and includes landmarks such as the pubic crest, pubic tubercle, and pectineal line, which serve as attachment sites or anatomical boundaries for nearby structures .¹