"A spermatogenic failure characterized by multiple morphologic abnormalities of the flagella resulting in ansence of forward motility in spermatozoa and infertility that has_material_basis_in homozygous or compound heterozygous mutation in SPEF2 on chromosome 5p13.2."^^ . _:vb50945732 . "SPGF43"^^ . . "DOID:0111917"^^ . _:vb50945732 . _:vb50945732 . _:vb50945732 . . "OMIM:618751"^^ . . . "disease_ontology"^^ . "spermatogenic failure 43"^^ . _:vb50945732 .