"disease_ontology"^^ . . _:vb50946414 . "OMIM:619145"^^ . "DOID:0112272"^^ . "SPGF50"^^ . . . . "spermatogenic failure 50"^^ . _:vb50946414 . "An azoospermia characterized by azoospermia resulting from meiotic arrest at prophase I that has_material_basis_in homozygous or compound heterozygous mutation in XRCC2 on chromosome 7q36.1."^^ . _:vb50946414 . _:vb50946414 . _:vb50946414 .