For men looking to avoid getting their partner pregnant, there are basically two options — condoms or a vasectomy. Now, scientists are experimenting with an unlikely third option, magnets. A team in China has developed a long-lasting and biodegradable male contraceptive which uses injections of nanoparticles and magnetic fields to keep men from reproducing.
Their study tested this concept on male mice, examining the effectiveness of two different kinds of nanomaterials entering the body. The process involves heating the nanoparticles after magnets help to guide these tiny particles down into the testes. Once there, they act as a contraceptive as the heat shrinks the testes and inhibits spermatogenesis. More