Disheartening blastocyst update? Or I should be happy?

Laura • 👭 🏳️‍🌈 36 years old, 4 failed IUIs, 3 IVF rounds. One beautiful 2 year old girl. Transferred 2 embryos 4/16/2021. Miscarried 6/9/21. Wife transferred 2 embryos 7/2/21!

We had retrieval on Saturday to learn we had 11 eggs, 9 mature. A phone call came on Monday to say ALL 9 were fertilizing "perfectly." So after 2 days, our spirits were pretty high. Our 5 day call came this morning to learn that one was ready for cryopreserving and the other 8 are still being "cultured." After googling a bit tonight, I'm learning that 6 day blasts is not necessarily out of the ordinary. Does anyone have a reassuring story and/or can relate? Everytime we get news it seems one more waiting period is added. I appreciate any insights!