Around day 5-6 of embryonic development, the embryo enters a stage known as a blastocyst. It is characterized by the differentiation of cells into two large groups: trofoectoderm cells and internal cell mass cells (ICM).
Read the full article on: Cygote, Embryo and Fetus: What Are the Differences? ( 107).
By Andrea Rodrigo (embryologist) and Romina Packan (babygest staff).
Last Update: 10/25/2019
