Carnegie Stage 23

Carnegie Stage Definition
Age is approximately 56 postovulatory days
Length is approximately 28-30mm (middle range); full range is 23-32mm
External Features include: The eyelids are starting to fuse at margins. The superficial vascular plexus is rapidly approaching the vertex of the head. The limbs have increased markedly in length and show more advanced differentiation of their subdivisions.
(O'Rahilly R and Muller F [1987] Developmental Stages in Human Embryos. Carnegie Institute, Washington, Publication no. 637)
 
Views and movies of the CS23 OPT model as a 3D object.
  Section Browser with Anatomy Tree
The section browser allows you to view the 3D CS23 OPT model in three orthogonal planes. Anatomical regions have been painted onto the model which can be identified in each of the section planes.