Movie TheaterCircadian Rhythms |
| Buy NowFrom The Biology of Prenatal Development. |
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Script: From 19 weeks fetal movement, breathing activity, and heart rate begin to follow daily cycles called circadian rhythms. |
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All ages referenced to fertilization, not last menstrual period.
One month = 4 weeks.
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Circadian Rhythms
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Responds to Sound
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Skin and Hair
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Age of Viability
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4D Ultrasound
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Blink-Startle Response
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