the end of gastrulation.png Figure 2. Localization of primordial germ cells (PGCs) in mouse, rabbit and chick by the end of gastrulation. A: Mouse PGCs
post-hatching to the start of gastrulation.png Fig 3. Cattle embryo staging system from post-hatching to the start of gastrulation. Criteria for, and diagrammatic
eutherian embryos at peri-gastrulation stage.png Figure 1. Comparison of morphology of eutherian embryos at peri-gastrulation stage. (A) Evolutionary tree