生後8か月の睡眠退行：サイン、続く期間、助けになること | Nurtura Daily
生後8か月ごろに睡眠が崩れやすいのはなぜか。どのくらい続くのか。それでも普通といえる睡眠時間はどのくらいか。そして、私たちがこの時期を乗り越えるのに役立った工夫を紹介します。
How long does the 8 month sleep regression last?
There is no official figure, because it is a parenting term rather than a diagnosis. Many parents find it eases within a few weeks. If poor sleep lasts longer, or comes with fever, ear pulling, breathing noises or poor feeding, check with your pediatrician.