_:vb50945753 . _:vb50945753 . _:vb50945753 . _:vb50945753 . _:vb50945753 "A spermatogenic failure characterized by multiple morphologic abnormalities of the flagella, asthenoteratozoospermia, and infertility that has_material_basis_in homozygous or compound heterozygous mutation in TTC21A on chromosome 3p22.2."^^ . _:vb50945753 . _:vb50945753 "url:https://pubmed.ncbi.nlm.nih.gov/30929735/"^^ .