Also, it's BS. Women taking estrogen-based birth control would be at higher risk than fertile women not on BC so they can have kids. The risk is not large for most women. It's incredibly small because we're dealing with young, healthy adults in the prime of their lives, but it is higher with BC than without. The entire premise of this story is junk science - and anyone who has ever been trained to talk to a young woman about her options in that department should recognize this.