Billings Centre
Presents the Billings method for planning for future conception, includes a list of instructors in Canada.
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.
Feminist Women's Health Center
Fertility Awareness Method (FAM) for natural birth control.
Fertility Friend
Free assistance and information for natural conception.
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.
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