_:vb50946482 . _:vb50946482 . _:vb50946482 "A spermatogenic failure characterized by male infertility caused by the majority of spermatozoa having round heads and acrosome defects."^^ . _:vb50946482 . _:vb50946482 . _:vb50946482 "url:https://pubmed.ncbi.nlm.nih.gov/3338587/"^^ . _:vb50946482 .