My next cycle is to be a donor one hence I wont be having the stims this time around

They are going to put me on progynova, at the same time my sister starts her stims, to boost my E2 levels to simulate a cycle after I come off the pill.

Has anyone been on progynova? I thought it may be what is used in a medicated FET but I have never had one.

Does progynova give any side effects or is there anything I can expect taking it?

Thanks!