Breakthrough takes big step toward safe, reversible male contraception Cornell Chronicle Most male contraceptives take months to work, but a new approach stops sperm in under an hour, by blocking an enzyme they need to swim. In mice, one dose was 100% effective Male contraceptive 'bath' device invented in Germany, wins Dyson award The Jerusalem Post Most male contraceptives take months to work, but a new approach stops sperm in under an hour, by blocking an enzyme they need to swim. In mice, one dose was 100% effective Hello Cake Spin Stroker Vibrator for Men, Waterproof & Rechargeable Massager Toy with 15 Modes, Yellow Walmart.com Non hormonal male contraceptive implant lasts at least two years in trials Medical research The Guardian