_:vb50945757 . _:vb50945757 "url:https://pubmed.ncbi.nlm.nih.gov/29606301/"^^ . _:vb50945757 . _:vb50945757 "A spermatogenic failure characterized by multiple morphologic abnormalities of the flagella, malformed sperm heads, and very low sperm counts that has_material_basis_in homozygous or compound heterozygous mutation in CFAP69 on chromosome 7q21.13."^^ . _:vb50945757 . _:vb50945757 . _:vb50945757 .