CHR: Chromosome, SNP: Single nucleotide polymorphism, FGR: Fetal growth restriction, OR: Odds ratio, CI: Confidence interval, MTR: 5,10-methylenetetrahydrofolate reductase, MTRR: Methionine synthase reductase, SHMT1: Serine hydroxymethyl transferase 1, TYMS: Thymidylate synthetase. Logistic regression was used. Statistically significant results were selected taking into account the permutation test (1000 permutations were performed). This evidence concerns the gene SHMT1 and fetal growth restriction.