Well, a lot is going to depend on your individual condition. If you've no symptoms or clots, and no history of baby loss, some doctors might not push the blood thinners at all yet. However, your condition might be more serious or threatening and it may be important to have you on thinners through birth and beyond. I had a very minor clotting issue we were only treating because I had some visible placental clotting, taking lovenox once a day. However, near the end I went off the lovenox and opted for twice weekly biophysical profiles while waiting for spontaneous labor and homebirthing. This is less of an option for women whose lives may be threatened by more signifigant clotting issues. The big thing I would do if you're going into a realm of clotting disorders and bloodthinners is to see a specialist. It's an area of prenatal care that's been evolving a lot, with changing standards of care, so I'd find a good perinatologist that follows this stuff rather than my regular ob to manage the clotting issues and advise me on what the relative risks for what courses of action might really be.