Hi Dr SHER, my clinic’s FET protocol has me on both progesterone vaginal capsules 200mg 3x/day plus 100mg PIO once daily in preparation for FET. They tested my levels day before transfer and was good; they tested day after and now is too high and want me to reduce PIO to 25mg until my beta in 2 weeks. Can this elevated P level have affected implantation? What effect can high levels of P have on implantation and should I be worried?