Vitrified IVF Morulae.

Vitrified IVF Morulae.
Vitrified morula after thawing. The embryo at the top is a Grade 4, Code 2 (50 to 84% viable embryo mass), the one below is a Grade 5, Code 1 (>85% viable embryo mass).

Zambrano-Varon J (2012)