This paper was presented at the International Jubilee Conference, 50th Anniversary of Billings Method, University of Melbourne, Australia, conducted by Ovulation Method Research & Reference Centre of Australia, March 28-30, 2003.
In the 30 years fertile life of women, only a few days in each cycle are fertile and the rest of time infertile. People of insight have long considered making use of this natural phenomenon to regulate fertility. Early methods of natural family planning (rhythm, basal body temperature, symptothermal, etc.) are unsatisfactory for fertility regulation and the Chinese people did not accept them. In the early 60’s, Drs. J.J. and E.L. Billings and their colleagues discovered the interrelationship between the cervical mucus and the cyclic changes in the ovarian hormones and fertility and alleged the use of mucus symptom as the main index of ovulation and fertility applicable to all phases of female reproductive life. This is a milestone in the study of natural family planning.
Since the official introduction of the Billings Ovulation Method (BOM) into China by the Chinese Ministry of Health in 1995, the method has been distributed to almost every corner of China, including the industrial and agricultural areas and the minority regions. Chinese women of different strata and ethnic groups readily understand the meaning of the mucus patterns described in the Billings books and all of them accept the method. After teaching, most subjects are able to recognize the peak symptom from the first cycle and the rest from the second cycle, except in a few (around 1%) having anovulatory cycles as confirmed by plasma hormonal assay.