Korean J Nutr.  2005 Apr;38(3):211-218.

Effect of Folic Acid Supplementation on Serum Homocysteine and B Vitamins in Infertile Women

• Eom H
• Kim KN
• Chang N

Abstract

Elevated homocysteine concentration is known to be related to placental abruption, spontaneous abortion, and many adverse pregnancy outcomes. The purpose of this study was to investigate the effects of folic acid supplementation (1000 microgram per day) and 5, 10 methylenetetrahydrofolate reductase (MTHFR) C677T polymorphism genotype on serum homocysteine and B vitamin levels in 50 infertile women (aged 31.2 +/- 3.2 years). Blood sampling was performed at baseline and at the end of folic acid supplementation period. In infertile women, serum folate and vitamin B12 concentrations were significantly higher in post-supplementation than those in pre-supplementation. Serum homocysteine concentration was significantly lower in post-supplementation than that in pre-supplementation. However, serum homocysteine levels were still higher in the T/T genotype than those in the C/C or C/T even after folic acid supplementation. Serum homocysteine was inversely related to serum folate in T/T homozygotes at baseline and at the end of folic acid supplementation. These results suggest that folic acid supplementation is needed for infertile women to improve their vitamin status and also to reduce the risk of hyperhomocysteinemia. These effects were different according to their MTHFR C677T genotypes. Therefore, further studies are necessary to determine the optimal level of supplementation of folic acid by MTHFR genotypes.

Keyword

serum B vitamins; serum homocysteine; folic acid supplementation; MTHFR genotype; infertile women

MeSH Terms

Abortion, Spontaneous
Abruptio Placentae
Female
Folic Acid*
Genotype
Homocysteine*
Homozygote
Humans
Hyperhomocysteinemia
Methylenetetrahydrofolate Reductase (NADPH2)
Pregnancy
Pregnancy Outcome
Vitamin B 12
Vitamin B Complex*
Vitamins
Folic Acid
Homocysteine
Methylenetetrahydrofolate Reductase (NADPH2)
Vitamin B 12
Vitamin B Complex
Vitamins