Couple to Couple League - Provides information, teaching and support for couples using or wanting to learn about Natural Family Planning. www.ccli.org
Cukierski Apostolate - Includes information on Natural Family Planning, including the ability to order the book "What Every Catholic Couple Should Know". www.angelfire.com/oh/CukierskiApostolate
One More Soul - This site's purpose is to convince people of the truth that artificial contraception is wrong. www.catholicity.com/cathedral/omsoul
