While men are twice as likely to have a heart attack, heart disease is still the leading cause of death among women. Women are also more likely to experience the subtler symptoms — the ones that don't look like a heart attack until it's too late to act quickly.

One in five women will have a stroke in her lifetime. Women are also more likely to experience the less obvious symptoms — the ones that don't show up on the FAST checklist — which means strokes go unrecognized and untreated more often than they should.

Most people couldn't imagine getting an STI — but the numbers tell a different story. At least 70% of women with chlamydia have no symptoms, and one in 20 sexually active young women aged 14–24 is affected. Here's what you need to know about testing and why it matters.