On its second day of culture, the embryo must have 4 cells (blastomeres) of similar size. If it has another number of cells, its speed of development is not adequate, and if it has fragments, vacuoles or other structures, they 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: 10/16/2019
