Women's health experts are skeptical of a newly FDA-approved mobile medical app that keeps track of women's menstrual cycles as a method of contraception. Cindy Pearson, executive director of the National Women's Health Network, and Jennifer Conti, a clinical assistant professor of obstetrics and gynecology at Stanford University and a fellow at Physicians for Reproductive Health, referred to a widespread consensus in the field of women's health that the app's underlying method -- called fertility awareness -- can be very...