結果 : how much total sleep should a 3 year old get
0:57

Mayo Clinic Minute: How much sleep do kids need?

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Columbia University Irving Medical Center
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CBS News
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Science Explains How Much Sleep You Need Depending on Your Age

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How much sleep do you really need? | Sleeping with Science, a TED series

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How Much Sleep Do You Need? - Professor Of Neuroscience, Russel Foster

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Yoga Guru - Hansaji | How many hours should you sleep?

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Not enough sleep may harm children’s developing brains

WXYZ-TV Detroit | Channel 7
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Children’s bedtime: Tips for a good sleep routine

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Mastering the Art of Sleep: Finding the Perfect Balance of Deep, Light, and REM Sleep

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2 से 5 साल के बच्चों को कितना सोना चाइये | Sleep requirement for 2 to 5 year old kids

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