Table 1.

Semen volume in relation to the CYP1A1 polymorphism in azoospermic and fertile men

	Group and genotype	Semen volume
		Reduced (<1.5 ml)	Normal (>1.5 ml)
Infertile	TT (wild) n=40	28	12
	TC (hetero) n=70	52	18
	CC (homo) n=10	4	6
Fertile	TT (wild) n=52	0	52
	TC (hetero) n=27	0	27
	CC (homo) n=1	0	1