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The Endowment for Human Development
The Endowment for Human Development
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Response to Light


6 months, 2 weeks

From The Biology of Prenatal Development.Buy Now

Script: Innen 26 uker kan øyene produsere tårer.

Pupillene reagerer mot lys så tidlig som uke 27. Denne reaksjon regulerer lysmengden som når øyenes netthinner gjennom hele livet.

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