Hmm well ok
So 3 means fully formed but not thinned on shell or hatching out, not horrible, but may take longer to thin and start implant...
b- loose cells, so not packed but also not too few...
b-few cells, but not the worst grading with no big cells...
Sounds like you transferred an avg bean, but not a bad one, just not text book perfect. No reason to think you are out just yet tho. Lil one just needs some more time to divide and thin out shell to hatch
This is one of my fav sites for all things IVF- hope it helps!
Embryologists are brainiacs lol and don't always speak in terms NORMAL ppl understand...I went thru that sigh
https://www.advancedfertility.com/blastocystimages.htm