Background: Craniosynostosis affects approximately one in 2500 live births worldwide. Sagittal synostosis is the most common type. Metopic synostosis is the second most common, followed by coronal synostosis; lambdoid synostosis is rare. More than one suture is affected in 5 to 15 percent of cases. Craniosynostosis can be divided into simple and complex. Only one suture is involved in simple craniosynostosis. By contrast, in complex craniosynostosis two or more sutures close. Clinical diagnosis of craniosynostosis is not imminent in the neonatal period. it is difficult to ascertain whether it is deformational or true craniosynostosis. Plain radiographs can show either the fused suture, the concomitant stenotic ridge and exaggerated digital impressions, suggesting increased ICP. Surgery is indicated to prevent raised intracranial pressure and mental retardation and to reduce the impact of dysmorphisms on psychological behavior. The ideal timing window remains an issue of debate regarding concerns of patient stability during surgery due to blood loss, surgical complexity, and postoperative complications. Early surgery before 6 months prevents the dysmorphism from worsening, might benefit from passive postoperative remodelling due to the rapid growth of the brain in the first 6 months of life and malleability of calvarial bone. This malleability also facilitates intraoperative bone reshaping.But, Increased surgical and anesthetic risk in young infants is a common rational for the delay of craniosynostosis repair .many concerns regarding the surgical and anesthetic safety of open repair on infants under 6 months of age are related to hemodynamic instability. The optimal timing for primary cranial vault reconstruction in nonsyndromic craniosynostosis.