Actually, the method encouraged now by the Church is the one where you take your temperature to see if you are ovulating. Not sure how effective it is
Hello DonnaJo,
I happen to know a little bit about it, and it's effective if applied correctly, but you have to be very disciplined, and if you do it wrong once everything might be screwed...
Yet it's not as effective as other correctly applied contraceptives. One can always refer to the Pearl index: