Seems like there's an app for just about everything these days, especially in the world of health.

Apps can help you track your calories, workouts, your heart rate, and these days a mobile phone can also be a staunch ally in tracking a woman's fertility. 

Moira Weigel wrote about this for The Guardian. Her piece is titled "Fitbit for your period: The rise of Fertility Tracking."

She joins Alex Cohen for a conversation on why fertility apps have become so popular and whether they're scientifically sound.

To hear the entire conversation click on the audio link embedded at the top of the post.