C-grade embryos may or may not have a correct number of blastomeres, usually with asymmetry and some multinucleated blastomeres. The percentage of fragmentation is between 25 and 35% and can be located or distributed throughout the embryo. The zona pellucida can be normal or present alterations in some cases.
Embryo Grade C
By Edurne Martínez Sanz BSc, MSc (senior clinical embryologist), José Muñoz Ramírez BSc, MSc, PhD (senior clinical embryologist), Mark P. Trolice MD, FACOG, FACS, FACE (reproductive endocrinologist), Marta Barranquero Gómez BSc, MSc (embryologist), Neus Ferrando Gilabert BSc, MSc (embryologist), Zaira Salvador BSc, MSc (embryologist) and Romina Packan (invitra staff).
Last Update: 10/24/2019