<prompt> Most common bone fractured during birth -MP 98ScapulaHumerusClavicleRadius  <response>: Bones may be broken fractured during a difficult delivery. A fracture of the collarbone clavicle is most common. The upper arm bone humerus or upper leg bone femur may break during a difficult delivery. However, arm or leg fractures are very unusual. A fractured bone in a newborn is kept from moving as much as possible by use of a sling or cast. Fractures in newborns almost always heal completely and rapidly. Fracture of one of the bones of the skull may occur. Skull fractures are very rare. Unless the fracture forms an indentation depressed fracture, it heals rapidly without treatment. 