Xenopus development stages
Digitized images and developmental data from Nieuwkoop and Faber (1994) Normal Table of Xenopus laevis (Daudin). Garland Publishing Inc, New York. Copyright © 1994 Pieter D. Nieuwkoop and J. Faber.
Digital photographs of Xenopus embryos used with permission by Barbra Lom, work performed by William Graham, and Ian Willoughby. All rights reserved. No portion of them can be used without prior expressed permission .