15
6: Four Simple Rules to Prevent Pregnancy
There are just four simple rules of the Billings Ovulation Method™ to help you prevent
pregnancy. They apply in all circumstances and all stages of reproductive life,
even if you are breastfeeding, you have irregular cycles, or you are approaching
menopause.
The Early Day Rules apply to the days before ovulation
Early Day Rule 1
Avoid intercourse on days of heavy menstrual bleeding
In a short cycle fertility may begin before bleeding has finished, and the bleeding
could mask the presence of the mucus which indicates fertility.
