Marie, I have no experience but I consulted Dr. Google about it and fount this:
MTHFR mutation can be homozygous (2 copies) or heterozygous (1 copy), with more people being heterozygous and carrying only one MTHFR mutated gene. Compound heterozygous (one copy of each mutation). Homozygous, of course, can cause more issues and become more serious.
It`s a fairly easy thing to test for by checking homocysteine levels in the blood.
Treatment consists of simple vitamin supplements --- FolaPro L-methyl tetrahydrofolate by Metagenics, OR, 5 tetrahydrofolate or methyl folate.
Longevity Plus, H.R. T. Plus with 5-tetrahydrofolate.
Life Extension, optimized folate (5-MTHF).
OR prescriptions like:
*Deplin/ 7.5 mg l-methylfolate
OR
*Metanx-L methyl folate calcium (as Metafolin) 3 mg, Pyridoxal 5` phosphate 35 mg, methylcobalamin 2 mg.
OR
Methyl B-12 injections
The vitamin supplementation is lifelong. After childbirth you may switch from prenatal to a women`s multivitamin.
https://sites.google.com/site/drjoneskids/mthfr
ETA: Also found this: https://www.stephenwellsmd.com/mthfr.htm