Perinatal definition - Medical Dictionary definitions of popular medical terms easily defined on MedTerms

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November 25, 2009

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Definition of Perinatal

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Perinatal: Pertaining to the period immediately before and after birth. The perinatal period is defined in diverse ways. Depending on the definition, it starts at the 20th to 28th week of gestation and ends 1 to 4 weeks after birth. The word "perinatal" is a hybrid of the Greek "peri-" meaning "around or about" and "natal" from the Latin "natus" meaning "born."

Last Editorial Review: 12/16/1998 3:24:00 PM

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