Having to do with the period of time after birth.
occurring immediately after birth; "postnatal development"
happening after birth, especially soon after birth
Occurring, existing or performed after birth.
the period following birth.
The time period after birth.
Occurring sometime after birth, with reference to the newborn infant.
Occurring after birth, especially during the period immediately after birth.
Postnatal (Latin for 'after birth') is the period beginning immediately after the birth of a child and extending for about six weeks. The period is also known as postpartum period and, less commonly, puerperium.