<prompt> Neonatal period extends upto21 days of life30 days of life28 days of life35 days of life  <response>: Neonatal period extends from bih to 28 days under 4 wks of age. First week of life7days or 168 hrs is known as early neonatal period. Late neonatal period extends from 7th day to 28th day. Reference : page 124 Ghai Essential Pediatrics 8th edition 