DAZL and primary ovarian failure: Furthermore, polymorphisms in both the promoter and coding sequence of DAZL have been correlated with total sperm count, sperm motility, age at menopause and primary ovarian insufficiency (POI), also known as premature ovarian failure, in infertile men and women, respectively (Teng et al., 2002; Tung et al., 2006a), although other studies have been unable to find such associations (Bartoloni et al., 2004; Zerbetto et al., 2008).