Eggs, sperm & embryos
Grading helps the laboratory rank embryos for transfer or freezing. It correlates loosely with the chance of implantation but cannot predict a healthy baby, and grading systems differ between clinics, so grades from different laboratories are not directly comparable.
Also known as: embryo quality, grading, AA embryo
Related Canada guides
Sources
- Canadian Fertility and Andrology Society (CFAS)
- ESHRE guidance (used where Canadian wording is unavailable)
Last reviewed: September 9, 2026. Written by the Antega Editorial Team. General information only — always follow the advice of your own clinic, doctor or pharmacist.