_:vb50939866 . _:vb50939866 . . "spermatogenic failure 16"^^ . "OMIM:617187"^^ . . "disease_ontology"^^ . _:vb50939866 . . "A male infertility due to acephalic spermatozoa that is characterized by autosomal recessive inheritance of acephalic spermatozoa that has_material_basis_in mutation in the SUN5 gene on chromosome 20q11."^^ . "SPGF16"@en . . "DOID:0070184"^^ . _:vb50939866 . "acephalic spermatozoa syndrome"@en . _:vb50939866 .