A grade 2 blastocyst, also called cavitated blastocyst (CB) is that embryo on day 5 in which it is possible to differentiate the trophectoderm and the inner cell mass (ICM). Therefore, in this type of blastocyst, each of the parts that form it is perfectly differentiated.
What is a grade 2 blastocyst?
By Marta Barranquero Gómez B.Sc., M.Sc. (embryologist).
Last Update: 01/20/2021
Marta Barranquero Gómez
Graduated in Biochemistry and Biomedical Sciences by the University of Valencia (UV) and specialized in Assisted Reproduction by the University of Alcalá de Henares (UAH) in collaboration with Ginefiv and in Clinical Genetics by the University of Alcalá de Henares (UAH).