Perinatal means “at or around the time of birth.” Doctors use it for the stretch just before a baby is born, the birth itself, and the first days or weeks after.

Perinatal意思是 means "at or around the time of birth."「在出生前後那段時間」。Doctors醫生 use it for the stretch just before a baby is born用它來指嬰兒出生前的那一段時間、the birth itself出生的當下、and the first days or weeks after還有出生後最初幾天或幾週。

It is a hospital and textbook word.

It它是 a hospital and textbook word一個醫院和教科書裡的用詞。

A parent at home would say “around the birth” or “when the baby was born,” not “in the perinatal period.” It is about that whole window, not only pregnancy and not only after the baby arrives.

A parent at home一個在家的父母 would say "around the birth" or "when the baby was born,"會說「出生前後」或「寶寶出生的時候」，not "in the perinatal period."而不會說「in the perinatal period」。It它指的是 is about that whole window整個那段時間，not only pregnancy不只是懷孕期 and not only after the baby arrives也不只是寶寶出生之後。

Though actually, hospitals do not all draw the line in exactly the same place — some count from a certain week of pregnancy to a week after birth; others go a little longer — so “around birth” is the right English idea, and the exact dates are a medical choice.

Though actually不過事實上，hospitals do not all draw the line in exactly the same place各家醫院劃分的界線不完全一樣——some count from a certain week of pregnancy to a week after birth有些是從懷孕的某一週算到出生後一週；others go a little longer有些則算得再長一點——so "around birth" is the right English idea所以「around birth」（出生前後）才是正確的英文概念，and the exact dates are a medical choice確切的日期則是醫學上的判斷。