Condoms are 98% effective when used correctly (the problem is that most couples think they have it on correctly and dont)
Birth control pills are 99% effective as long as she is not taking any antibiotics while on it (which lowers the effectivness.)
5-8 out of 100 women on the patch will become pregnant
5-8 women out of 100 on the ring will become pregnant
29 out of 100 women on spermicide will become pregnant
30 out of every 100 couples using the pull out method will become pregnant
add: 1-2 out of every 100 will get pregnant after the morning after pill.
You can use a condom with most of these except spermicide (it does funny things to the latex which makes it less effective.)
the female cannot use the ring, patch, or pill together because all contain hormones and that would be waaay too many hormones for her body.