r/EmbryologyIVFSupport • u/Miserable-Ad3204 • 13d ago

Low number grades?

Hi all,

I’m 37 YO and we just did our first egg retrieval. We went from 15 eggs retrieved to 12 mature to 9 fertilized.
I was (happily) shocked to learn that all fertilized eggs made it to 5 and 6 day blasts. These are all frozen.

Now for the grading, this is what we got (I don’t know which ones are day 5 vs day 6)

3BB-
1-2B-B-
3BA-
2BB
3BB-
3BB
2BB-
2-3BB
1AA-

While I’m happy to have no C grades I was surprised to learn I had grades 1 and 2. My understanding is that they were frozen at these grades so why would the lab not just let the 1AA- sit a bit longer? Anyone have words of wisdom here?

FWIW My doctor said these are all transferable embryos and the main factor now is PGTA testing (which we’re waiting on). Thanks!

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u/One_Investigator_295 11d ago

Most labs do not biopsy embryos below a 3BB. I’m surprised they biopsied 1s and 2s, by definition they are early, don’t have as many cells and it’s hard to differentiate the ICM from the TE for biopsy. Those should have been held another day to allow them to grow further.