Last Updated：2025/12/04

(medicine) The period from the birth of a baby to when the baby is about three months old.

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fourth trimester

Source Word

fourth trimester

(medicine) The period from the birth of a baby to when the baby is about three months old.

Japanese Meaning

（医学用語）赤ちゃんの出生後から約3ヶ月間を指す期間。

Many new parents feel overwhelmed during the fourth trimester as they adjust to caring for a newborn.

多くの新米の親は、生後約3か月までの期間に新生児の世話に慣れる過程で圧倒されることがあります。

Sense（1）

(medicine) The period from the birth of a baby to when the baby is about three months old.

fourth trimesters

（ plural ）