for a single mutation of MTHFR with normal homocysteine levels, even Beer Center would not give Lovenox. Something like half the population has some copy of MTHFR, by itself it is not a red flag for miscarriage.
They told me they look for 3 single mutations of possible clotting markers before giving Lovenox (or double mutations). I had the same MTHFR result as the original poster + one other single mutation of PAI-1 = they said no Lovenox, just baby aspirin, just not enough reason for a powerful drug.
I personally took Lovenox anyway as a personal decision at my own risk BUT I also don't think I really needed it. I would never advise someone to take Lovenox and baby aspirin at the same time, too much risk of bleeding.