The husband is fertile all the time while the wife is fertile only a few days of her menstrual cycle. NFP teaches the couple to daily recognize and consider their combined fertility – their ability to conceive new life together. In practicing NFP, each spouse accepts their significant role and responsibility for the effectiveness of the method. Recognizing their combined fertility, husbands and wives team-up in planning their family and discerning God’s will for them.
- Fehring, Lawrence, D. (2004). "Majority of couples experience improved relationships with use of NFP." Current Medical Research Supplement, 15. http://lifeissues.net/writers/feh/feh_01majorityofcouples.html
- Fehring, Lawrence, D., (1994). "Spiritual well-being, self-esteem and intimacy." Catholic Medical Association. http://lifeissues.net/writers/feh/feh_37spiritualwellbeing.html