Define perinatal period?
Perinatal period: The interval between the bih of an infant born after 20 weeks' gestation and the 28 completed days after that bih. When perinatal rates are based on bihweight, rather than gestational age, it is recommended that the perinatal period is defined as commencing at 500 g.Ref: William&;s Obstetrics; 24th edition; Chapter 1; Overview of Obstetrics
The interval between the bih of an infant born after 20 weeks' gestation and the 28 completed days after that bih
The interval between the bih of an infant born after 20 weeks' gestation and the 7 completed days after that bih
The interval between the bih of an infant born after 28 weeks' gestation and the 28 completed days after that bih
The interval between the bih of an infant born after 28 weeks' gestation and the 7 completed days after that bih
General obstetrics