Definitions for "Perinatal"
The perinatal period is defined as the time from the 28th week of gestation to the end of the first week after birth. Perinatal health generally refers to fetal/newborn health.
the period from the twentieth week of gestation through the first twenty-eight days after delivery.
Relating to the period just before or just after birth. Usually defined as from 18th week of pregnancy to the end of the first week after birth