Fingers 2-5 are nearly parallel. Nail primordia are visible on
the toes. The eyelids have fused in most cases by the end of the stage
and the pinna almost completely covers the external auditory meatus.
The umbilical hernia is disappearing and there is a corresponding
increase in the size of the peritoneal sac.
Absent: fingers
and toes joined together.
16 dpc > 60 Somite pairs Witschi Stage 33 (rat)
All scale bars in microns. Click on an image for a larger version.