Uhhhh I'm guessing that person was absolutely spewing bullshit. I cannot possibly see how that is true, considering birth control is usually based on sex hormones. Plus, if he didn't even specify what type of birth control, then it's almost definitely bullshit - there are different kinds that have totally different stuff in them...there's no way they can all have that same affect.
I guess I can't say for sure...but come on...that's just ridiculous sounding.