Couples invited to learn more about NFP Engaged and married couples interested in learning more about Natural Family Planning (NFP) are invited to contact Michelle Fessel in the Parish Office to discuss upcoming class opportunities in the Harrison County area. NFP is the practice of observing and charting these fertility signs to determine accurately when a woman is fertile and when she is infertile. When you want to achieve pregnancy, NFP helps you identify the most fertile time. When you want to avoid pregnancy, you abstain during the fertile time. NFP can be used in ANY cycle regardless of the woman's circumstances.