<prompt> Neonatal period is -Upto 1 year of lifeUpto 28 days of life28 days to 1 year of lifeFirst 7 days of life  <response>: Ans. is b i.e., Upto 28 days of life Childhood o Infancy upto 1 year A Neonatal -- First 28 days of life a Early neonatal -9 First 7 days of life b Late neonatal -4 7 days of 28 days of life B Post neonatal -- 28 days to 1 year o Pre-school 1-4 years o School age -- 5-14 years Perinatal period -- Period from 28th week of gestation to the seventh day after bih. 