I miscarried the last baby at almost 11 weeks, but it wasnt due to progesterone issues , because I was taking those and my levels were where they needed to be at. So my doctor now wants me to start progesterone at 4 dpo that way when I do get pregnant again, my levels wont be low from the beginning of my pregnancy to hopefully prevent another miscarriage, and other problems. I've had 2 miscarriages. Neither of them can be explained.