Alva Review-Courier -

LONDON (AP) — The condom, the pill and now, the smartphone?

Natural Cycles, a mobile fertility app, this month became the first ever digital contraceptive device to win FDA marketing approval. Women take their temperatures and track their menstrual cycle on the app, which uses an algorithm to determine when they're fertile and should abstain from unprotected sex or use protection. In effect, it's a form of the rhythm or calendar method.

The Swedish startup says it's effective and lets women avoid side effects common with other methods like birth control pills. But reports of unwanted pregnanci...