My Serum Progesterone level end of follicular phase(day 12) is 1.02,my probable frozen embryo transfer on day 14 was cancelled by doctor due to high progesterone level.That time(d3-d12) doctor prescribed estradiol valerate 2 mg per day 6 nos.but now doctor suggested only Norethisterone 10 for quick period.Now my question is how my serum progesterone will come to normal for frozen embryo transfer.why progesterone increase that time