Videos Billings Ovulation Method® Series This video will provide you an overview of the science of the Billings Ovulation Method® and an Introduction of the Billings Ovulation Method® Series Video List Overview of the Billings Ovulation Method® Series Episode 1 Four Phases of the Cycle Episode 2 The Four Rules of the Billings Ovulation Method® Episode 3 Irregular Pattern or Irregular Cycle Episode 4 The Incredible Cervix Episode 5 The Four Types of Bleeding Episode 6 Using Slide Rule to Teach the Billings Ovulation Method® Episode 7 Teaching the Rules of Billings Ovulation Method® Using the Slide Rule Episode 8 How to Observe Mucus and How to Chart?