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.
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.
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