B.B.
I have anticardiolipin antibodies which make my blood clot too fast. If by some miracle an egg were to go down the one tube that isn't blocked and try to implant, it would auto-abort before it could get started because my blood would clot all around it.
I have had two successful ART (assisted reproductive technology) cycles - took Lovenox once a day for both cycles. The alternative was heparin twice a day.
There might be something else with the progesterone levels too or something. WIth my second, I had some placental tears and ended up having to take hydroxyprogesterone the entire pregnancy, but everything went well.
My doctor was David McLaughlin, and he and his staff are FANTASTIC. www.familyjoy.net I would go to him before trying to get pregnant again. He likes to find out 'the rules of the game before you start'. I ended up having stuff wrong with me that I never knew could affect getting pregnant, and by finding that stuff out ahead of time and doing what he told us to do allowed us to have the successful cycles. I'd be glad to answer any questions about what we went through if that'll help.
For what it's worth, and good luck!