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The Endowment for Human Development
The Endowment for Human Development
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Nails and Fingerprints


11 weeks

From The Biology of Prenatal Development.Buy Now

Script: Fingernails and toenails begin to develop.

Unique fingerprints appear 10 weeks after fertilization. These patterns can be used for identification throughout life.

All ages referenced to fertilization, not last menstrual period.
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4D Ultrasound
4D Ultrasound
Ossification Underway
Ossification Underway
Nails and Fingerprints
Nails and Fingerprints
Nose and Lips
Nose and Lips
4D Ultrasound
4D Ultrasound
Male and Female
Male and Female
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