So my one doctor has been trying to get me to up my prometrium to all cycle long. I currently take 100mgs during the second half. She now wants me to do 100mg during the first half and then up it to 200mg during the second. I chickened out this last cycle and am now debating it for this one. I had a couple of 100mg pills left from last cycle (think I miscounted and stopped to early), so I took them a few days into this new cycle. I'm not sure whether I should continue though. I asked my endo about it and he seemed skeptical. He always is though. No surprise there. Wondering if any of you have used it all cycle long?