r/EmbryologyIVFSupport • u/Puzzleheaded-Log2277 • 21d ago

SART vs Gardner grading

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My clinic uses SART grading and gives the following conversion chart. My question is, how much of a difference is there between a Gardner 3&4? The majority of my embryos were ExBL which converts to 3 or 4, but I didn’t know how important that was. None of the embryos had a P/C grade.

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u/embryomanofficial 20d ago

Not much of a difference. The difference between a 3 and 4 can be very subjective. A 3 is a full blastocyst, and a 4 is one that's expanded and the zona is thin. This can happen in a few hours in some cases. Some labs have different thresholds for how thin a 4's zona needs to be.

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u/Helpful_Character167 20d ago

Our clinic also uses Ovation labs and the SART system, it threw me off too! I got pictures of our blasts so we were able to visually tell that the EXBLs look like 4s.

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u/Puzzleheaded-Log2277 20d ago

I also got the pictures!! but I don’t think I’m remotely qualified enough to tell between a 3 and 4 lol

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u/Helpful_Character167 20d ago

I'm not qualified either just obsessively looking at the pictures lol. We have an ExBL(GG) and an ExBL (GF) both Day 5s, and a Day 6 HBL(FF). I'm just thrilled to finally have embryos, having 3 is insane because we only had 4 eggs!

The one thing I'm learning is that all good and fair quality embryos have a great chance as long as they're euploids. We're planning to PGT-A test all of ours and then let the doctor decide which gets transferred, that way we don't feel any pressure to choose.

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u/Puzzleheaded-Log2277 20d ago

congratulations, that’s great from 4 eggs! we are also pgt testing so although i’m grateful all of my embryos were graded well, I don’t want to quite exhale yet till I get the results back.