title: [Two cases of "9 + 0" immotile spermatozoa].
mesh_terms: D000328:Adult; D006801:Humans; D007248:Infertility, Male / Q000473:pathology*; D008297:Male; D013081:Sperm Motility; D013082:Sperm Tail / Q000002:abnormalities / Q000648:ultrastructure; D013094:Spermatozoa / Q000002:abnormalities*