Day 3 grading help

Christina

Hello we had ICSI and 13 fertilized. My day 3 grading is confusing. I have ranges from 3D to 4B to 8C etc. I’m concerned I don’t have anything with an A on day 3. Has anyone had successful blasts generated from their day 3 embryos with my type of grading in the photo? I’m wondering if ICSI makes them grow slower at first but they will catch up by day 6?