Anyone have success with a 3BB or 4BB embryo?

I just got my lab report back regarding my embryos. I’m feeling really good about the number of embryos that I’ve got but I’m starting to worry that I’ve got pretty much just 3BBs and 4BBs. I hear a lot of people on here saying they had a successful pregnancy and birth but then I see that the embryo they used was 5AA or 5AB. I haven’t seen a lot of people posting success of lower graded embryos. I would love to hear about some successes with lower graded embryos if anyone is able to share. I just want to know it’s possible.