New ovarian cancer test | Testosterone | How the PAP test began | A deep look at sleep

We heard today about a new test for ovarian cancer.  For a long time there's been a search for a way to reliably detect this cancer early on. Some men are prescribed testosterone-replacement therapy in middle age or older, but there's questions around how safe that is for their heart attack and stroke risk. In developing the cervical screening program one woman—Mary Papanicolaou—did a test every day, for 21 years—it's what we now call the PAP test. People tend to think they need seven or eight hours sleep a night. But what counts more is the quality of that sleep.