Normal embryo but low grade?

Fr

Hi ladies! In July, I try again for baby number 2! I’m excited! I tested my embryos and I have a 4BC normal embryo to transfer. I know this isn’t a strong embryo but it did test normal. My nurse said to ignore the “BC” and focus that it’s normal.

Has anyone transferred a BC and had success? This may be my last attempt and I’m anxious.