What are the chances of becoming pregnant if you are on birth control pills but have unprotected sex on your ovulation days?
Birth control pills are typicaly around 98% effective in preventing pregnancies, but they are not 100%. Also, it would depend on if you had messed up on your pills at all in t…he last month or so. Typically pregnancy while taking the birth control properly very rarely happens, but, no birth control is 100% effective except for abstinance. ! In addition If you have been taking your pills as scheduled, not missing any, you will not ovulate 98% of the time. The purpose of the birth control pill is to cease ovulation, therefore, not releasing an egg, preventing pregnancy. (MORE)