Natural Family Planning
Natural Family Planning (NFP) is a set of methods that help couples understand their fertility by observing the body's natural signs. These methods can be used both to achieve pregnancy and to postpone it. NFP involves no drugs, devices, or surgical procedures. It is morally accepted by the Catholic Church as outlined in Humanae Vitae (1968).
Methods Overview
There are several well-established NFP methods. Each has a different focus and appeals to different couples. All are effective when learned properly.
Tracks basal body temperature and cervical mucus observations. One of the most widely used methods in the United States.
Effectiveness: 98-99% with correct use
Taught by: Couple to Couple League, SymptoPro Fertility Education
Uses standardized mucus observations with a detailed charting system. Often paired with NaProTechnology for medical applications.
Effectiveness: 96-99% with correct use
Taught by: FertilityCare Centers, Pope Paul VI Institute
Relies solely on cervical mucus observations, making it accessible and widely available internationally.
Effectiveness: 97-99% with correct use
Taught by: Billings Ovulation Method Association
Uses a ClearBlue fertility monitor (measures hormones in urine) plus mucus observations. Appeals to couples who prefer objective data.
Effectiveness: 98-99% with correct use
Taught by: Marquette University College of Nursing
A temporary method for breastfeeding mothers. Effective only if specific conditions are met: exclusive breastfeeding, baby under 6 months, and no return of menstrual periods.
Effectiveness: 98% when conditions are met
Taught by: Often taught through lactation consultants or NFP instructors
Church Teaching on NFP and Contraception
The Catholic Church teaches that the unitive and procreative meanings of the marital act cannot be separated. NFP respects both meanings; contraception deliberately separates them. The key documents below explain this teaching.
Pope Paul VI, 1968
The foundational encyclical explaining why contraception is not morally acceptable and affirming that the unitive and procreative meanings of the marital act cannot be separated.
Pope John Paul II, 1981
Addresses the role of the Christian family, including responsible parenthood and the dignity of marriage.
Pope John Paul II, 1979-1984 (series of audience talks)
A series of teachings on the meaning of the human body, sexuality, and self-gift. Provides the theological foundation for understanding the Church's teaching on contraception and NFP.
NFP vs Contraception: A Clear Comparison
The Church's teaching is not just about avoiding pregnancy. It is about the nature of the marital act itself and what it means to give oneself fully to one's spouse.
| Aspect | NFP | Contraception |
|---|---|---|
| Approach to fertility | Respects and works with the natural cycle | Suppresses or blocks fertility |
| Health effects | No side effects; increases body awareness | Possible side effects (hormonal changes, medical risks) |
| Shared responsibility | Requires communication and mutual cooperation | Often one partner bears the medical burden |
| Moral teaching | Accepted by the Church (preserves both meanings of the act) | Not accepted by the Church (separates unitive and procreative meanings) |
| Intention matters | Can be used selfishly or generously; discernment required | Still a problem even with serious reasons; the act itself is the issue |
Important: NFP can be used selfishly just as contraception can. The Church teaches that couples must have serious reasons to avoid pregnancy. The key difference is that NFP respects the nature of the act itself, while contraception changes it.
Getting Started with NFP
Most couples learn NFP during marriage preparation or in the first year of marriage. Here are the practical steps.
NFP instruction is often required or strongly encouraged during marriage preparation. Your parish can point you to local classes.
Review the methods above and pick one that fits your lifestyle. Some couples prefer objective data (Marquette), others prefer simplicity (Billings), and many choose the comprehensive approach (Sympto-Thermal or Creighton).
NFP is for couples, not just women. Take the class together. Most methods offer in-person or online instruction with follow-up support.
Expect to spend at least 3 cycles learning the method well. Your instructor will guide you through the charting process and help you interpret signs correctly.
USCCB has an NFP page with links to all major methods. Couple to Couple League, FertilityCare, Billings, and Marquette all have websites with instructor directories and educational materials.
Frequently Asked Questions
Yes. When used correctly, modern NFP methods have effectiveness rates of 96-99%, comparable to hormonal contraception. The key is proper instruction and consistent use by both partners.
No. The rhythm method was a calendar-based guess about fertility. Modern NFP methods observe real-time signs of fertility (temperature, mucus, hormones) and are far more accurate and reliable.
The Church teaches that contraception is not morally acceptable. NFP is the morally acceptable way to plan family size. Whether you use NFP to postpone pregnancy is a decision you make in prayer and discernment, considering serious reasons if you choose to avoid conception.
This is a conversation to have during engagement and marriage preparation. Couples are encouraged to learn about NFP together, understand the Church's teaching, and work through concerns with a priest, deacon, or marriage preparation mentor.
NFP is a tool for understanding fertility. It is primarily taught in the context of marriage. Some women learn fertility awareness for medical or health reasons (such as diagnosing reproductive health issues through NaProTechnology). The moral teaching on chastity outside marriage still applies.
Start with your parish. Many parishes require or offer NFP instruction as part of marriage preparation. You can also search the websites of the major NFP organizations: Couple to Couple League, Creighton Model, Billings Method, and Marquette Method. The USCCB website has a directory of NFP resources.
This page provides a practical overview of NFP and the Church's teaching. Final guidance is always determined by your local parish and diocese. If you have questions about NFP or the Church's teaching on contraception, talk to your priest, deacon, or marriage preparation mentor.