"Science. Confusing everyone since the 1500s!"

Girl. 
For no particular reason.

An interesting article came out recently in the popular press. Bottom line: Oral contraceptives (OC) can increase risk of stroke. OC can also increase risks for other diseases as well.

Let's talk about stroke first. Current use of OC increases chance of a clot breaking of somewhere in the veins/arteries and causing stroke. Interesting side-note: Chances go up with the amount of estrogen in the OC. Nerdy way of saying this: "... the risk is directly proportional to the amount of estrogen present in the pill." 

The article also says there is an increase in brain and breast cancers. Brain cancer chance IS doubled but the type of brain cancer they're talking about is very rare so a doubling still makes it ... very rare. 

Breast cancer is increased but only if you are a recent user (within the prior year). 

And what of the affect of oral contraceptives (OC) on stroke? "Current OC use increases risks of venous thromboembolism and ischemic stroke. However, women of reproductive age are at low baseline risk, so the chances are small."