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A potential new male contraceptive drug has just been tested in human volunteers for the first time, giving early indications that it may be safe CREDIT: This is an edited version of an article that originally appeared in The Conversation Unlike previous attempts, this drug does not use artificial hormones, nor does it interfere with testosterone production in the testes. Many earlier male contraceptive drugs have failed because they caused undesirable hormonal side-effects such as changes in mood, reduced libido, or metabolic issues. The new approach is non-invasive, does not keep reading