Billings Ovulation Method Association
Information about this method and access to instructors who assist couples achieve future conception.
Family of the Americas
Discusses natural family planning through the ovulation method.
Fertility Wizard
Free online calculator gives daily estimates of fertility based on menstrual cycle.
Fondation SymptoTherm
Swiss organization offering support and information on the Sympto-thermal method.
Hormonal Forecaster
Charts fertility to avoid or achieve pregnancy. Also generate personal statistics, and forecast future moods and behaviors.
Natural Conception Control - Dr. Jonas Method
Provides details on how to use observations of natural cycles to accomplish contraception or to select a future baby's gender.
Natural Methods
Emory University School of Medicine review of abstinence, fertility awareness, breastfeeding, outercourse, and withdrawal as methods of birth control or child spacing.
Ovulation Calendar
Calculates fertility period using actual dates while considering length of cycle, provides a printable version to share with physician.
The Fertility Awareness Center
Fertility Awareness Center in New York City. Resources, contact and method information.
The NFP Files
Collection of FAQs, articles, links, resources, and organizations that explain natural family planning as an alternative to contraception, sterilization and abortifacients.
Twin Cities Natural Family Planning Center
Information on Ovulation Method, human fertility cycles, and other non-chemical approaches to family planning.