1. Creighton Model FertilityCare
  2. FertilityCare Centers of America –
  4. The American Academy of FertilityCare Professionals –
  5. One More Soul – Directory of NFP-only doctors –
  6. 1Flesh – Changing the face of NFP –


  1. Hilgers, Thomas W., The NaProTechnology Revolution: Unleashing the Power in a Woman’s Cycle. Beaufort Books (2010).
  2. Packard, Jean (editor), In Their Own Words…Women Healed (Physician comments by Thomas W. Hilgers, M.D.) Pope Paul VI Institute Press (2008).
  3. West, Christopher. Good News About Sex and Marriage: Answers to Your Honest Questions About Catholic Teaching. St. Anthony Messenger Press (2004).
  4. Doyle, Fletcher. Natural Family Planning Blessed Our Marriage: 19 True Stories. St. Anthony Messenger Press (2006).
  5. Weschler, Toni. Taking Charge of Your Fertility, 10th Anniversary Edition: The Definitive Guide to Natural Birth Control, Pregnancy Achievement, and Reproductive Health. Collins (2006).
  6. Shannon, Marilyn M. Fertility, Cycles, & Nutrition 4th Edition. Couple to Couple League (2009).
  7. Wallace, Marilyn (Editor) and Thomas W. Hilgers. The Gift of Life: Proceedings of a National Conference on the Vatican Instruction on Reproductive Ethics and Technology. Pope Paul VI Inst Press (1990).

Peer-Reviewed Papers

  1. Hilgers TW and Stanford JB: The Use-Effectiveness to Avoid Pregnancy of the Creighton Model NaProEducation Technology: A Meta-Analysis of Prospective Trials. J Repro Med 43:495-502, June1998.
  2. Fehring RJ, Lawrence D, and Philpot C: Use Effectiveness of the Creighton Model Ovulation Method of Natural Family Planning. J Obstet Gynecol, and Neonat Nurs 23: 303-309, 1994.
  3. Morishita H, Hashimoto T, Mitani H, et al: Cervical Mucus and Prediction of the Time of Ovulation. Gyn Obstet Invest 10: 157-162, 1979.
  4. Flynn AM, and Lynch SS: Cervical Mucus Identification of the Fertile Phase of the Menstrual Cycle. Brit J Obstet Gynaecol 83:545, 1976.
  5. Odeblad E: The Biophysical Properties of the Cervical-Vaginal Secretions. Int Rev Nat Fam Plan 7: 1-56, 1983.
  6. Hilgers TW and Prebil AM: The Ovulation Method—Vulvar Observations as an Index of Fertility/Infertility. Obstet Gynecol 53: 12-22, 1979.

For a complete listing of papers relating to the scientific foundation of the Creighton Model FertilityCare™ System, see here.

Other Eastern FertilityCare Centers

Find a local NaPro Medical Consultant

More NaProTECHNOLOGY Resources

Other Natural Methods of Family Planning

Mucus Only Methods

  1. Billings Ovulation Method  –
  2. Family of the Americas

Sympto-Thermal Methods

  1. Couple-to-Couple League
  2. Marquette Model
  3. Standard Sympto Thermal Method –