Are you thinking of using contraception to prevent pregnancy? Are you already using it? Have you ever considered how it works? Is it effective 100% of the time? Will it prevent STI’s? We put together a chart of the most commonly used methods of birth control to answer all of these questions for you. ** The only way to 100% protect against STI’s is abstinence When used correctly contraception is very effective in preventing pregnancy, but we’re not all perfect and sometime