What is the most effective way of birth control?
A. Abstenance (no sex) is of course 100% effective against pregnancy. Now for the answer that you were looking for: Your other choices for birth control should depend on your bodies chemistry and make-up. What works well for one woman, will not work at all for others. You may have to try different methods until you find what you are comfortable with. You should check with your doctor on these choices. Failure rates for each birth control method listed in these FAQs pages, is listed at the bottom of each answer.