A contraceptive pill for men has moved one step closer after Australian researchers successfully made male mice infertile, according to a study published Tuesday.
Monash University scientists genetically modified mice to block two proteins found on the smooth muscle cells which are essential for sperm to travel through the animal's reproductive organs.
The result was that even though the mice had sex normally and were otherwise healthy, they were infertile, researcher Sabatino Ventura from Melbourne's Monash University said.
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