This booklet written by Dr John Billings is based on a keynote address delivered by Dr Billings to a Conference in Chengdu China attended by the Directors and senior staff from Family Planning Institutes in the Provinces of China.

An explanation is given of the development and spread of the Billings Ovulation Method®, the scientific validation and the spread of the Method in China.

An important historical resource of the impact of the Billings Ovulation Method® in offering a natural and safe method of fertility regulation.