Two very useful websites:
http://www.billings.life
Particularly the pages:
www.woombinternational.org
Some places to look within these websites:
- What is the Billings Method?
- Rules of the Method
- Keeping a Record
- Audio/Media Presentation of the BOM
- Medical and Scientific Facts
- Abnormal Patterns
- FAQ
- 10 reasons to use the Billings Ovulation Method® to Prevent Pregnancy
- Effectiveness in Preventing Pregnancy
