Table 5. Common MTHFR haplotypes in relation to male infertility.

Haplotype	Frequency (overall)	Frequency (case, control)	Chi square	P value
CACG	0.307	0.311, 0.299	0.193	0.6602
CCGG	0.23	0.237, 0.210	1.231	0.2672
CCCG	0.117	0.115, 0.121	0.103	0.7482
TACG	0.111	0.120, 0.085	3.642	0.0563
CCGA	0.1	0.089, 0.130	5.371	0.0205*
CAGG	0.05	0.049, 0.052	0.051	0.8213
CAGA	0.044	0.038, 0.060	3.462	0.0628
TCCG	0.021	0.020, 0.025	0.329	0.5664