What's better than the pill, vasectomy, celibacy and rhythm?
Rorvik
D M
DM
D000728:Androgens; D000830:Animals, Laboratory; D001519:Behavior; D001695:Biology; D003267:Contraception; D004703:Endocrine System; D005069:Evaluation Studies as Topic; D005193:Family Planning Services; D006728:Hormones; D008571:Men; D010827:Physiology; D012106:Research; D012725:Sexual Behavior; D013739:Testosterone; D014465:Ultrasonics
D000728:Androgens; D006728:Hormones; D013739:Testosterone