title: Boar semen sampling by electro-ejaculation.
mesh_terms: D000700:Analgesics; D000768:Anesthesia, General / Q000662:veterinary; D000818:Animals; D004542:Ejaculation; D004558:Electric Stimulation; D008297:Male; D009019:Morphinans; D012661:Semen / Q000166:cytology*; D013094:Spermatozoa; D013552:Swine
chemical_list: D000700:Analgesics; D009019:Morphinans