The morula is the blackberry-shaped embryonic structure that forms at 4 days of the embryo's development and precedes the blastocyst. The cells must be compacted in order to continue their development properly.
Structure of a compact morula
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