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Human Embryo

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Carnegie Stage 16 (37 post-ovulatory days)



About Carnegie Stage 16

Most embryos at stage 16 are approximately 37 postovulatory days old and measure 11-14 mm in length. Distinguishing criteria for this stage include the external appearance of retinal pigment, the nasal pits face ventrally, pharyngeal arch 2 is more massive and conspicuous than arch 3, auricular bumps begin to appear, and the thigh, leg, and foot can be distinguished in the lower limb.

Photographs

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Animations

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MRI Slice Selector

Mouse: click on a line below to select a view
Finger: tap a line below with a very light touch


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© 2001. 

Multi-dimensional Human Embryo Project by Brad Smith (NIH award N01-HD-6-3257 P/G F003637) is licensed under CC BY-NC-SA 4.0