After 3 days in culture, the embryo should have 8 cells (blastomeres) of similar size. Otherwise its development could be slower or faster, suggesting that the embryo is not evolving properly.
Structure of a 3 day old embryo with 8 cells
By Edurne Martínez Sanz BSc, MSc (senior clinical embryologist), Gorka Barrenetxea Ziarrusta MD, PhD (gynecologist), José Luis de Pablo BSc, MSc, PhD (senior clinical embryologist), José Muñoz Ramírez BSc, MSc, PhD (senior clinical embryologist), Neus Ferrando Gilabert BSc, MSc (embryologist), Zaira Salvador BSc, MSc (embryologist) and Romina Packan (invitra staff).
Last Update: 04/16/2020