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The biological basis for male contraception was established decades ago, but despite promising breakthroughs and the financial burden men increasingly bear due to better enforcement of child ...

This overview focuses on the recent developments in the safety and efficacy of the levonorgestrel-releasing intrauterine system (LNG-IUS) on established indications, namely contraception ...

In terms of efficacy, 43 men (4.8%) failed to suppress spermatogenesis to <1 million sperm per ml of ejaculate, a level judged to be a reasonable goal for male hormonal contraceptives. 2 19 ...