See the "What is the Sympto-Thermal Method" section: http://www.plannedparenthood.org/health-topics/birth-control/fertility-awareness-4217.htm http://www.planne

See the "What is the Sympto-Thermal Method" section: http://www.plannedparenthood.org/health-topics/birth-control/fertility-awareness-4217.htm http://www.plannedparenthood.org/health-topics/birth-control... EDIT: posted the wrong link before...sorry =)