Last Updated
：2025/12/08
sleep regression
Noun
Japanese Meaning
乳幼児が生後最初の2年間に経験する一時的な睡眠パターンの変化期間。数日から数週間にわたり、睡眠リズムが乱れ、夜間の頻繁な覚醒や日中の不機嫌さなどが見られる現象。
（ plural ）
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(psychology) A period of days or weeks during the first two years of life characterized by a change in an infant's sleep patterns, leading to irregularities such as increased awakenings and fussiness.
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sleep regression
Many parents don't realize that a sleep regression can cause their baby to wake frequently at night for several weeks.
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Many parents don't realize that a sleep regression can cause their baby to wake frequently at night for several weeks.
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