What matters more—embryos being euploid or embryo grading?

Waiting on PGT results and our doc gave us our embryo grades. Our clinic rarely gives A’s but said the first letter is the most important/most prognostic of outcomes. Curious what matters more—if they’re euploid or their grades.

TW: embryo grades

Anyone have experience with the following grades:

• Day 5 – BBB
• Day 5 – BCB
• Day 6 – CCC
• Day 6 – BCC
• Day 6 – BBC
• Day 6 – BCC