Yes, BCP are used. I'm actually on Nortrel right now. We're doing an FET, and basically, the IPs pick a transfer date, and we work backwards. I'll take the active pills until it's time for hormones, then I will get one last "period", and then it's hormones only until the transfer day.
With my first gestational surrogacy, we did fresh cycles each time, and I'm pretty sure the intended mother had to go on BCP too, but that was mostly for egg retrieval. The GC's cycle is synced to the IM's.
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