http://www.helium.com/knowledge/50609-assessing-the-creighton-method-of-natural-family-planning-nfp.xml Helium.com > Fertility Issues > Assessing the Creighton method of Natural Family Planning (NFP) en-us Copyright Helium.com Fri, 19 Sep 2008 21:46:30 GMT Fri, 19 Sep 2008 21:46:30 GMT