Male Infertility with Azoospermia or Oligozoospermia Due to Single Gene Mutation is related to spermatogenic failure 1 and male infertility due to large-headed multiflagellar polyploid spermatozoa. An important gene associated with Male Infertility with Azoospermia or Oligozoospermia Due to Single Gene Mutation is PNLDC1 (PARN Like Ribonuclease Domain Containing Exonuclease 1), and among its related pathways/superpathways are Primary ovarian insufficiency and Ovarian infertility. Related phenotypes are increased circulating gonadotropin level and azoospermia