Day 1 embryos to blastocysts?

Ashleigh
Hey ladies, I had my egg collection yesterday, got 12 eggs all up. Received a call today saying 8 fertilised. So I'm just wondering what everyone's number were from egg collection or day one of fertilisation to day 5 blast? I'm super worried some or all maybe die or arrest in development. So some actual experiences would put my mind at ease. Thanks! 😊