Sperm protein may offer target for male contraceptive
![sperm and egg](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/10/100115_mr_malecontraceptive_free-1.jpg?fit=860%2C460&ssl=1)
ROAD BLOCK Blocking a newly identified protein in sperm tails stops sperm from penetrating eggs, and could be the key for developing male contraceptives.
cornishman/iStockphoto
ROAD BLOCK Blocking a newly identified protein in sperm tails stops sperm from penetrating eggs, and could be the key for developing male contraceptives.
cornishman/iStockphoto