As Isuelda said, if taken correctly, combination birth control pills are more than 99% effective. Used alone and perfectly, the withdrawal method is only 96% effective, but because few men have the self-control to really use the withdrawal method perfectly, about 30% of couples who use withdrawal only will experience a pregnancy.
Birth control pills, except for progestin-only types, already provide two levels of protection. The estrogen component prevents ovulation, and the progestin portion thickens your mucus to prevent implantation into the uterine walls if for some reason ovulation does occur. So really, you are using two forms of birth control already!
If you do not trust yourself to take the pills correctly, at the SAME time, EVERY day, then there may be some validity in pulling out or condom use, but if you are diligent about your oral BC pills, there really should be nothing to worry about.
|