_:vb50945719 . _:vb50945719 "url:https://pubmed.ncbi.nlm.nih.gov/30656449/"^^ . _:vb50945719 . _:vb50945719 . _:vb50945719 "A male infertility characterized by dirsuption of the process of sperm development from diploid cells into mature haploid spermatozoa."^^ . _:vb50945719 . _:vb50945719 .