Are Cell Phone Bills the New Fertility Calendars?

We've heard about the forthcoming STD testing app for smartphones. Just yesterday, HowStuffWorks premiered a super fantastic app that is guaranteed to change your life. And as if life couldn't get any more amazing thanks to cell phones, psychologists have discovered yet another functionality for these gadgets. Cell phones might be able to track a woman's fertility.

Other mammals signal that they're fertile in obvious ways, but human females seem to advertise in more subtle ways. In this episode, Molly and Cristen present seven (supposed) signs of subliminal ovulation.