The embryo becomes a blastocyst when it reaches the fifth day of development. At this stage of embryonic development, it is possible to distinguish three main structures in the blastocyst:
- Blastocele: this is an internal cavity that is covered with fluid.
- Trophoectoderm: this will give rise to the placenta, as well as extra-embryonic structures.
- Inner cell mass: this will form the foetus.
By Amel Khelifi Schreiber B.Sc., M.Sc., Ph.D. (embryologist), Antonio Alcaide Raya B.Sc., M.Sc., Ph.D. (senior embryologist), Gustavo Daniel Carti M.D. (gynecologist), Julio Martín (expert in clinical diagnostics), Zaira Salvador B.Sc., M.Sc. (embryologist) and Romina Packan (invitra staff).
Last Update: 06/19/2023