Donor results

Been going through IVF for 4 years, last year after two years of searching, we finally agreed on a donor.

Retrieval was last week, resulted in 34 eggs. Of those 18 fertilized, and of those 10 made it to blastocyst at day 5 and 7 of those graded well. Having PGS testing done, only because we cannot see ourselves terminating a pregnancy if their is a genetic anomaly. I feel like I should be more excited with having 7 potential babies. Instead I am worried and scared that the 7 embryos we have will somehow come back genetically deficient. We have lost 5 naturally conceived babies since starting this journey and when it comes down to my true fear, I don't want to fail my best friend and partner.