Table 3. Hardy-Weinberg distribution for MTHFR 1298 genotypes in infertile and control populations.

	Allele X	Allele Y	Observed frequency	%	HW Expected frequency	%	Chi2	P value
AA	1150	0	575	55.61	600	58.00	1.023
AC	425	425	425	41.10	375	36.31	6.533
CC	0	68	34	3.29	59	5.68	10.436
Total	1575	493	1034	100.00	1034	100.00	17.992	0.000022*