I had a 9 day LP after I had an ectopic pregnancy. I was working on correcting it when I got pregnant with my son unexpectedly (well, I expected it lol, but it was unplanned, just got kinda irresponsible about birth control). Anyway, I had my progesterone levels drawn and they were low, so I asked for a prescription for progesterone suppliments. It only took a low dose (100 mg orally) and 4 days later my progesterone levels were where they should have been. I stayed on the suppliments until 15 weeks.
I can't say for certain that my cycle hadn't corrected itself for that pregnancy, and I can't say for certain that the progesterone is what helped me carry if it hadn't (it is actually not shown to decrease the liklihood of miscarriage), but I have a healthy 4 month old boy, born at home without complications.
I recommend correcting LPD BEFORE becoming pregnant. PM me if you want details :)
at 9:41 PM on Dec. 10, 2010