title: A comparative study in methods of cryoprotection for human semen.
mesh_terms: D002498:Centrifugation; D003451:Cryoprotective Agents; D005615:Freezing; D005990:Glycerol; D006801:Humans; D008297:Male; D008855:Microscopy, Electron, Scanning; D012662:Semen Preservation / Q000379:methods*; D013081:Sperm Motility; D013094:Spermatozoa / Q000648:ultrastructure
chemical_list: D003451:Cryoprotective Agents; D005990:Glycerol