Great news!
Listen, I would really really advise you to talk to your doctor again to make sure that he thinks it’s still a good idea to go with day 5 embryos.
My husband and I wanted to do 5 days embryos (blasta) and our RE thought that was a good idea. But when we got only 9 embryos and 3 out of them had some fragmentation on day 3 he called us to discuss it all over again. He said that it’s much harder for an embryo to survive and grow properly 2 extra days in a lab than in the uterus. That those embryos that might be perfect on day 3 may not even survive or have too much fragmentation on day 5. BUT it doesn’t mean at all that they would not have survive inside the uterus as again it’s much harder for them to do good outside of it.
He also mentioned (and we did read the same thing before) that some studies have shown that 5 days embryos implant worse sometime, perhaps due to not enough time for them to adapt before they have to implant (basically that they just got there and soon they have to implant).
Anyway, after we talked to our RE that day my husband and I said to him that we live the decision whether to go with day 3 or 5 embryos up to him (whatever he thought was the best choice) and he told us to come over that very evening for the transfer. So we transferred 2 good 3 day old embryos and that how our baby-boy Jonah was conceived

!
For all we know had we decided to go with day 5 embryos we could have ended up having no good embryos to transfer. Of course, it’s all about taking chances and hoping they are right, but it definitely won’t hurt to talk to your doctor to make sure he thinks that waiting until day 5 is still a good choice for you everything considered.
I can totally imagine how exited and worried you are right now; I’ve been there myself not too long ago. You are in my thoughts and I’m sending you tons of embryo-sticking vibes!

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