How likely is it to get pregnant when your on birth control?

Most modern Birth Control methods report a 99% success rate when used as directed. Unfortunately, many people do not use them "as directed" or are unaware of possible complications. For example, many types of oral contraceptive can be rendered ineffective by other prescription and non-prescription medications. Thus, the answer is that you are unlikely to get pregnant if you are using modern birth control methods very carefully. You should be VERY AWARE that YOU could be that 1% that fails.