Importantly, the study broke new ground as the first attempt at teasing out individual differences in birth control response, Lazorwitz says. “The focus has been on making better methods that don’t rely on a woman taking a pill everyday, like implants,” he says. But there’s probably a lot to be learned by taking a close look at the influence of genetics on birth control response, even outside of efficacy. “There are pretty common side effects with birth control, but not every woman gets side effects, and different women get different side effects,” Lazorwitz says. “I think there’s potential to dive into that question.