Movie TheaterAge of Viability |
 From The Biology of Prenatal Development. |
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Script: By 21 to 22 weeks after fertilization, the lungs gain some ability to breathe air. This is considered the age of viability because survival outside the womb becomes possible for some fetuses. |
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All ages referenced to fertilization, not last menstrual period.
One month = 4 weeks.
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Age of Viability
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4D Ultrasound
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Blink-Startle Response
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Somersaults
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4D Ultrasound
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Exposure to Loud Noise
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