on the basis of the concept that immunogenetic factors play a role in the incidence of unexplained male infertility , the so-called idiopathic infertility , hla antigen analyses were performed for ( 1 ) azoospermia cases among the infertile males diagnosed by testicular biopsies as having germ cell aplasia and ( 2 ) unexplained infertile couples .
C0021359
infertility
C0021364
infertile males