From fertilization, the embryonic development continues and the fusion of the two pronuclei takes place.
On day 2, the embryo presents 4 cells or blastomeres, on day 3 it presents 8 cells and so on.
Read the full article on: Classification criteria and categories according to the embryo quality ( 77).
By Andrea Rodrigo (embryologist), Marta Barranquero Gómez (embryologist) and Marie Tusseau (babygest staff).
Last Update: 06/26/2019
