An Abacus For Your Menstrual Cycle

A natural birth control method that involves keeping track of your cycle with a set of beads and abstaining from sex from day 8 to 19 was shown to be nearly as effective (when used properly) as the Pill and more effective than the diaphragm or condoms, according to a study of 1,646 women in six different countries. We’re kind of skeptical though, because there were 14.1 pregnancies for every 100 women per year in the study. The main reason the women got pregnant, the researchers found, was that couples knowingly took a risk and had sex on fertile days. Ya think? Being forbidden from having sex 11 days out of every month is probably one of the best aphrodisiacs out there. [Reuters]