Are You Pregnant?

There have been stories around for a long time about how you can tell things about people that are not necessarily immediately obvious from the things they're buying. There's very few reasons why you would buy folic acid unless you were either pregnant or planning on becoming pregnant, for instance. This, however, ovarian cancer, it's much more subtle. And so the question is, this is a retrospective study, knowing the answer, sneaking at the back of the textbook before you work things out.