title: Observations on the motility, ultrastructure and elemental composition of human spermatozoa incubated with caffeine.
mesh_terms: D000328:Adult; D002110:Caffeine / Q000494:pharmacology*; D006801:Humans; D066298:In Vitro Techniques; D007248:Infertility, Male / Q000503:physiopathology; D008297:Male; D008670:Metals / Q000032:analysis*; D008855:Microscopy, Electron, Scanning; D012661:Semen / Q000032:analysis*; D013081:Sperm Motility / Q000187:drug effects*; D013094:Spermatozoa / Q000187:drug effects / Q000648:ultrastructure*
chemical_list: D008670:Metals; D002110:Caffeine