D-grade embryos present an anomalous number of asymmetrical blastomeres and a high percentage of fragmentation. Sometimes the fragments are so large that they can be confused with cells. The large amount of multinucleation is not a good prognosis, as is the thickened zona pellucida.
Embryo Grade D
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