This 3D model was generated based on segmentation of the stage 23 embryo from the Virtual Human Embryo Project.

Details about this embryo, images, and further information can be found here: Virtual Human Embryo Stage 18

The description provided for the embryo is as follows:

The stage is represented by Carnegie embryo # 4430 that has been given a grade of excellent. This female embryo is considered to be the one of the best specimens in the Carnegie collection at this stage. It has a greatest length of 14.0 mm (after fixation) and is in the most advanced one-third of the stage. In 1923 it was fixed in corrosive acetic acid, embedded in paraffin and serially sectioned transverse to the long axis at 15 microns. The sections were mounted on 29 glass slides and stained with alum cochineal (i.e., carmine). There are 837 sections through the embryo