well thats the thing.. like you, she has normal homocysteine levels. she has had 2 miscarriages, 1 still birth, breast ca, family hx of strokes, and i believe she has a neural tube defect.
the lovenox is an anti-clotting drug which can cause bleeding if not prescribed perfectly. she already had spontaneously bleeding during her pg with her angel baby.
Which MTHFR mutations was it? Cause homozygous for 1298 wouldn't affect folate/homocysteine.
CBS can be upregulated, meaning it drains homocysteine really fast. If that's the case, then the worry would be high ammonia, and sulfites and low/normal methyl groups. The way to address that would be low animal protein to restrict methionine and more betaine/phospha* and folate/B12 to pull homocysteine in the opposite direction.
If you can follow it, this page would probably help: http://heartfixer.com/AMRI-Nutrigenomics.htm