How soon for Frozen Embryo Transfer (FET)?

Rayna • 38 years old and been blessed with two little boys, one through IVF and one conceived naturally, both with countless prayers.
My doctor told me today that he recommends a frozen transfer versus fresh for this <a href="https://glowing.com/glow-fertility-program">IVF</a> cycle. For those who have had a an FET, how soon after egg retrieval did you have the transfer?