title: New techniques for sperm acquisition in obstructive azoospermia.
mesh_terms: D001707:Biopsy, Needle / Q000379:methods; D015925:Cryopreservation / Q000592:standards; D006801:Humans; D008297:Male; D009845:Oligospermia / Q000209:etiology / Q000503:physiopathology*; D027724:Reproductive Techniques, Assisted; D012662:Semen Preservation / Q000592:standards; D013094:Spermatozoa / Q000166:cytology* / Q000473:pathology