 Condoms may slip off the penis after ejaculation , break due to improper application or physical damage ( such as tears caused when opening the package ) , or break or slip due to latex degradation ( typically from usage past the expiration date , improper storage , or exposure to oils ) . The rate of breakage is between 0 @.@ 4 % and 2 @.@ 3 % , while the rate of slippage is between 0 @.@ 6 % and 1 @.@ 3 % . Even if no breakage or slippage is observed , 1 – 3 % of women will test positive for semen residue after intercourse with a condom . 
