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[per-uh-neyt-l] /ˌpɛr əˈneɪt l/

occurring during or pertaining to the phase surrounding the time of birth, from the twentieth week of gestation to the twenty-eighth day of newborn life.
of, relating to, or occurring in the period from about three months before to one month after birth

1952, from peri- + natal.

perinatal per·i·na·tal (pěr’ə-nāt’l)
Of, relating to, or being the period around childbirth, especially the five months before and one month after birth.
per’i·na’tal·ly adv.


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