In a ceain population, there were 4050 bihs in last one year. There were 50 still bihs. 50 infants died within 7 days where as 150 died within 28 days. What is the neonatal moality rate-

Ans. is 'a' i.e., 50 Neonatal deaths are deaths occurring during the neonatal period, commencing at bih and ending 28 completed days after bih. Neonatal moality rate is the number of neonatal deaths in a given year per 1000 live bihs in that year.