The pill is 98% effective in preventing pregnancy when the man ejaculates inside of you but only if you use it perfectly. This means taking the pill at the same time every day.

You should also know that their is a period of time where you are not protected while taking the pill. This period of time occurs in the first seven days of taking the pill. Some people say that the pill does not become fully effective untill you ave been on it for one month, which is how I see it.

Their is always a risk of pregnancy with any birth control which is why me and my boyfriend err on the side of caution and use both condoms and the pill to prevent unplanned pregnancy.