Lovenox and Pregnancy with Health Concerns

Patient: My wife has had 3 miscarriages, 1 chemical and 2 at 6 to 7 weeks. The cause was unknown but we were put on a recurrent loss program that includes Lovenox. My wife has a few health problems that have come up in the past including MS on going, nose bleeds 0-2 a year, usually in the winter-spring time, Crohn’s disease she hasn’t had any flare ups in about three or so years, and mitral valve prolapse. My question is with these problems is Lovenox safe to use? Our doctor basically just left the decision to us and left our questions unanswered.