Fertility Awareness Center - Non-profit group providing information on the method and steps to learn fertility awareness from a non-religious perspective. - http://www.fertaware.com/
Fertility Circle - Fertility Circle we bring you online fertility charting, ovulation calendar and natural family planning. Whether trying to become pregnant or trying to avoid pregnancy, we are here to help you. - http://www.fertilitycircle.com
Natural Fertility of New Zealand - Teaches natural fertility awareness for couples trying to conceive or trying to avoid pregnancy. - http://www.naturalfertility.co.nz
Natural Methods - Emory University School of Medicine review of abstinence, fertility awareness, breastfeeding, outercourse, and withdrawal as methods of birth control or child spacing. - http://www.gynob.emory.edu/familyplanning/contraception_natural.cfm
Billings Centre - Presents the Billings method for planning for future conception, includes a list of instructors in Canada. - http://www.billings-centre.ab.ca
Billings Ovulation Method Association - Information about this method and access to instructors who assist couples achieve future conception. - http://www.boma-usa.org
Natural Conception Control - The Dr. Eugen Jonas method. Provides details on how to use observations of natural cycles to accomplish contraception or to select a future baby's gender. - http://www.usmev.com.au/gender.htm
Fertility Wizard - Fertility calculator gives daily estimates based on menstrual cycle. - http://www.gleeson.us/fertility/
Hormonal Forecaster - Charts fertility to avoid or achieve pregnancy. Also generate personal statistics, and forecast future moods and behaviors. - http://www.hfc.itgo.com/
Web Womb - Fertility indicator and pregnancy tests. Information on the Fertility Awareness Method. Product, contact information and charts. - http://www.webwomb.com/
Family of the Americas - Discusses natural family planning through the ovulation method. - http://www.familyplanning.net/
Fondation SymptoTherm - Swiss organization offering support and information on the Sympto-thermal method. - http://www.symptotherm.ch/en/
Feminist Women's Health Center - Fertility Awareness Method (FAM) for natural birth control. - http://www.fwhc.org/birth-control/fam.htm
Natural Family Planning - Brief fact sheet outlines the advantages and limitations of natural family planning, also called periodic abstinence, which requires users to practice abstinence during the fertile period of a woman's menstrual cycle. - http://www.rho.org/html/cont-nfp.htm
Philadelphia Natural Family Planning Network - Information on teaching providers in the area, with dates and locations of classes. Also information on this form of birth control, who can use it and how to learn it. - http://www.pnfpn.org
Billings Life - Covers the Billings Ovulation Method of natural family planning, research papers and teaching material, identifies teaching locations other countries. - http://www.woomb.org/
Twin Cities Natural Family Planning Center - Information on Ovulation Method, human fertility cycles, and other non-chemical approaches to family planning. - http://www.tcnfp.org/
National Association of the Ovulation Method of Ireland - Helps women learn how to manage their own fertility through monitoring body changes. Includes details of the Billings method of self-examination. - http://www.naomi.ie/