Pediatrics Impoant Terminologies and Primitive Neonatal reflexes 0f9d6152 Early Neonatal periods lasts upto: A 1st 72 hours of life B < 7 days of life C Completed 7 days of life D < 10 days of life High-Yield Explanation Early neonatal period Late neonatal period <7 days or <168 hours of bih 7th - <28th days of bih