One More Soul – They have a ton of information on love, chastity, marriage, and children, including a directory of doctors and instructors in NFP.
NFP International – A site dedicated to the teaching of Natural Family Planning, chastitiy, and morality in accordance with the Catholic Church.
The Pill Kills – A very informative site about the adverse effects of hormonal contraceptives.
Fertility Friday – They offer podcasts with special guests every Friday on a variety of medical, statistical, interpersonal, and uplifting fertility-related topics.
Book resources:
Holy Sex! By Gregory Popcak PhD
Good News about Sex and Marriage by Christopher West
The Sinner’s Guide to Natural Family Planning by Simcha Fischer