On its second day in culture, the embryo shoould have 4 cells (blastomeres) of similar size. If it has another number of cells, its development speed is not correct. Furthermore, if it has fragments, vacuoles or other structures, this could affect its evolution.
Read the full article on: How are embryos classified according to their day of development? ( 63).
By Alicia Francos Pérez M.D., M.Sc. (gynecologist), José Luis de Pablo B.Sc., M.Sc., Ph.D. (senior clinical embryologist), Zaira Salvador B.Sc., M.Sc. (embryologist), Cristina Algarra Goosman B.Sc., M.Sc. (psychologist) and Michelle Lorraine Embleton B.Sc. Ph.D. (biochemist).
Last Update: 04/16/2020
