Hi Jessleet, I started to take clexane as soon as I found out that I was pregnant and at 34 weeks I started to take haparin. The heparin is out of your system in 12 hours so it is safer to take close to your due date. I stopped taking the blood thinners 2 days before my c-section date. I had a spinal with my scheduled c-section and I did not have any problems. If you have taken clexane within 24 hours they will not give you an epidural.

I am really not sure why they want you to start them so close to your due date. Blood thinners are usually taken early in pregnancy. Was your baby measuring small at your last visit? If you are concerned about taking them give your doctor a call before you start. Make sure that you get all of your questions answered. That is what your doctor is there for. Good luck