DAZL and Infertility: Thangaraj et al,[13] reported two polymorphic sites in the DAZL gene in an Indian population comprising people of different ethnic / linguistic origins: A260G (T12A) of exon 2 in 8.1% and 7.4% of the infertile and fertile control men, respectively, and A437G polymorphism in four fertile and one infertile man.