他们发现当宝宝的睡眠模式改变——宝宝开始更多地小睡或者睡得更久——随之而来的一般是一段生长高峰期。

They found that when babies' sleep patterns shifted — when the infants began taking more naps or slept more overall — it was typically followed by a growth spurt.

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胎儿同样可以检测到快动期。研究者通过超声波发现，23周大的胎儿即开始在睡眠时快速移动眼球。

Fetuses also experience REM sleep. Studies using ultrasound have shown that fetuses exhibit REM sleep as early as the 23rd week of gestation.

youdao

胎儿同样可以检测到快动期。研究者通过超声波发现，23周大的胎儿即开始在睡眠时快速移动眼球。

Fetuses also experience REM sleep. Studies using ultrasound have shown that fetuses exhibit REM sleep as early as the 23rd week of gestation.

youdao