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About Carnegie Stage 20 Most embryos at stage 20 are approximately 50-51 postovulatory days old and measure 21-23 mm in length. Distinguishing criteria for this stage include upper limbs slightly bent at the elbows, short stubby fingers, hands curving over the cardiac region but still far apart from each other, and a fringe-like vascular plexus that marks growth centers laterally in the superficial tissues of the head. |
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| Sample Animations | ||||||||
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| Rotation Animation (650 KB QuickTime file) |
Neural Tube Rotation 1 (296 KB QuickTime file) |
Neural Tube Rotation 2 (650 KB QuickTime file) |
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| Heart Rotation (240 KB QuickTime file) |
Liver Rotation (264 KB QuickTime file) |
Stomach Rotation (232 KB QuickTime file) |
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| Eyes Rotation (232 KB QuickTime file) |
Lungs Rotation (248 KB QuickTime file) |
Suprarenals Rotation (244 KB QuickTime file) |
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| Cloaca Rotation (260 KB QuickTime file) |
Stereo View Rotation (3 MB QuickTime file, view cross-eyed) |
Psuedo Timelapse (650 KB QuickTime file) |
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| Optical Images | ||||||||
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| © 2006 Bradley R. Smith | ||||||||