Movie Theater
Circadian Rhythms
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Script: 从19周起，胎儿运动、 呼吸活动 和心搏率以一日为周期， 叫做昼夜节律。 | ||
| All ages referenced to fertilization, not last menstrual period. One month = 4 weeks. |
4D Ultrasound
Bronchial Tree
Circadian Rhythms
Responds to Sound
Skin and Hair
Age of Viability
