contraceptive
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Chemically Freezing Sperm Tails Could Be The Key To A Reversible Male Contraceptive
As sperm swim they transform chemical energy into motion, the way a car’s engine uses gas to propel you down the road. Like that engine, the process is complicated — if just one part stops working, the whole system can grind to a halt. This idea might lead to a contraceptive for men that’s reversible.