These are quotes from article I red recently, written by Professor Janet Smith.The link to the whole article you can find on the bottom of page.

 The Church approves of what is called Natural Family Planning or NFP. NFP is not the old rhythm method. It has nothing to do with counting days. I’m going to be explaining NFP by reference to days and numbers, but that’s irrelevant really to what I’m saying here; any woman can use NFP no matter how irregular her cycles. Continue reading →