Two very useful websites: http://www.billings.life Particularly the pages: Achieving Pregnancy Preventing Pregnancy Safeguarding Reproductive Health 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
