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特許 権利維持 Semen collection refers to the process of obtaining semen from male humans or other animals with the use of various methods, for the purposes of artificial insemination, or medical study (usually in fertility clinics). Semen can be collected via masturbation[1] (e. g., from male wolves,[2] dogs[3][4] and foxes[5][6]), prostate massage, artificial vagina, penile vibratory stimulation (vibroejaculation) and electroejaculation.