Xarelto to Lovenox?

Jennifer
How long do I need to wait for Xarelto to get out of my system before getting pregnant? I was on Lovenox with my last pregnancy (lost my baby boy at 12 weeks) and so I will start Lovenox again. I had a blood clot with my last pregnancy. Want to make sure I give it enough time so there is no chance my next pregnancy could have birth defects from the Xarelto.