Illustration of the early stages of embryonic development (embryogenesis) showing from left to right: a fertilized egg, 2-cell stage embryo, 4-cell stage embryo and a morula. | |
Licence : | Libre de droits |
Crédit: | Science Photo Library / NOBEASTSOFIERCE |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |