• 28 Days Fertility Awareness Method software. FAM information,discussion forum, product information.

• Astro Birth Control Details about using calculation of lunar phases for a natural and effective method for birth control.

• Babycomp and Ladycomp electronic device for birth control and family planning.

• Billings Ovulation Method of Family Planning effective, natural, cost free, simple method of family planning.

• Bioself manufacturers of an electronic device that determines the infertile and fertile periods in a woman's cycle for family planning.

• Family of the Americas proposes natural method for achieving or postponing pregnancy.

• Fem-Choice offers tracking software.

• Fondation SymptoTherm Swiss organization offering support and information on the Sympto-thermal method.

• Garden of Fertility: Natural Birth Control & Infertility Treatment Katie Singer's book, The Garden of Fertility explains Fertility Awareness.

• Global Health Options offers health tips, sexually transmitted diseases information, and contraceptive products.

• Natural Birth Control Ovulation Method. Method and contact information.

• Ovulation Method Research and Reference Centre of Australia offers information on fertility, Billings Ovulation Method of natural family planning, cycle variations, teaching, trials, and research papers.

• Philadelphia Natural Family Planning Network Information on teaching providers in the area, with dates and locations of classes.

• Priests for Life Catholic, pro-life resource that provides the information and tools necessary for clergy and laity to help end abortion and promote the Gospel of Life.

• Reliable Natural Birth Control A natural method with no charting or program to learn.

• Taking Charge of Your Fertility Toni Weschler's official site with information and software for the fertility awareness.

• The Fertility Awareness Center Fertility Awareness Center in New York City. Resources, contact and method information.

• Twin Cities Natural Family Planning Center Information on Ovulation Method, human fertility cycles, and other non-chemical approaches to family planning.

• Valley Electronics offers pocket computer to predict fertile days by temperature measurement.

• Web Womb Fertility indicator and pregnancy tests. Information on the Fertility Awareness Method. Product, contact information and charts.