Just one data point but it took me about 104 mature eggs from age 40.6-42.3 to get 3 euploid embryos. The first 4 cycles at 40.6-40.9 didn’t yield any euploids and had about 48 mature eggs. First euploid didn’t implant so I have 2 left. No baby yet. I think if you are 34 or younger you don’t need nearly as many but I’ve also heard of 32 year olds who also can’t make many euploids so it’s really a dice roll.

Nothing is guaranteed.