Is It Possible to See Signs of Pregnancy While on Birth Control? The likelihood of conception while on birth control varies based on how you take it. If you take it to perfection, there is a 1 in 100 chance of conception. But if you do not take the pill perfectly and invariably, then you have 7 in 100 chances of being pregnant. For more relevant information, have a look at this blog: https://zekond.com/read-blog/168576_is-it-possible-to-see-signs-of-pregnancy-while-on-birth-control.html