Although their apparently healthy sperm may swim like tiny Olympians, some men can still suffer from infertility if their sex cells lack a crucial 'chaperone' protein, researchers have found.
Source: http://www.cosmosmagazine.com/news/4309/new-chemical-male-contraceptive-stop-stis
Amber Valletta America Ferrera Amerie Amy Cobb Amy Smart Ana Beatriz Barros Ana Hickmann
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