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The Endowment for Human Development

The Endowment for Human Development

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From The Biology of Prenatal Development.

Script: 到26周，眼睛生产眼泪。

在27周，瞳孔对光作出反应。这种反应在一生中控制到达视网膜的光量。

All ages referenced to fertilization, not last menstrual period. One month = 4 weeks.

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4D Ultrasound

4D Ultrasound

Sense of Smell

Sense of Smell

Response to Light

Response to Light

4D Ultrasound

4D Ultrasound

4D Ultrasound

4D Ultrasound

4D Ultrasound

4D Ultrasound

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