Table 2

MTHFR genotype frequencies subdivided by normal and affected/carrier parents

MTHFR genotype
NoCCCTTT
Mothers226103 (45%)96 (42%)27 (12%)
    Affected196 (31%)7 (36%)6 (31%)
    Healthy20797 (46%)89 (43%)21 (10%)
Fathers21090 (42%)93 (44%)27 (13%)
    Affected2511 (44%)9 (36%)5 (20%)
    Healthy18579 (43%)84 (45%)22 (12%)