<prompt> Cephalhematoma usually disappears within35 months25 weeks35 weeks57 weeks  <response>: Cepholhematoma is a subperiosteal hemorrhage usually involving parietal and temporal bones.It is more common in forceps delivery, vaccum extraction and prolonged labor.It is soft and fluctuant swelling with well defined margins.A cepholhematoma crossing the midline indicates underlying fracture of the skull fracture is linear not depressed.It disappears between 2 week to 3 months. 