Minimum frozen embryos before doing any transfers if you were going for 2 children?

Ta
Husband & I are TTC#1 , but can't decide on how many embryos we should freeze (have to anyway due to PGS) before we start doing transfers. The doctors have recommended we transfer 2 at a time. I am scared of failure rate so would rather have more than less. Husband never took sex Ed so is irrationally optimistic that we only need 2 embryos = 1 FET to have 2 healthy children. We need to decide in 3 days.

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