About Carnegie Stage 17

Most embryos at stage 17 are approximately 41 postovulatory days old and measure 11-14 mm in length. Distinguishing criteria for this stage include distinct digital rays in the hand plate, a rounded digital plate in the foot, a complete complement of hillocks on the mandibular and hyoid arches, distinct nasofrontal grooves, and a slight indication of a lumbar curvature.

This specimen does not represent normal development. The caudal nueral tube has failed to close properly.

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