History
The first recorded observations of the relationship between cervical mucus and survival of spermatozoa come from the mid-19th century. The topic was not systematically studied, however, for almost another century. In 1948, Erik Odeblad was studying mycoplasms in the female genital tract. During the course of his studies, he noticed that cervical mucus changed in a predictable pattern through the course of a woman's cycle. He continued his study of the cervix.
Independently in 1953, Dr. John Billings (1918–2007) discovered the relationship between cervical mucus and fertility while assisting the marriage consultant for the Melbourne Catholic Family Welfare Bureau. Some of the couples he worked with had serious reasons to postpone pregnancy, and followed the Catholic Church's teachings of only using natural methods of pregnancy avoidance. While Dr. Billings was familiar with the Calendar and Basal Body Temperature methods, he felt there was a need for something more flexible and more reliable. He embarked on a study of medical literature, and found the mid-19th- and early-20th-century references to cervical mucus and sperm survival. He instructed women using the Rhythm method to avoid intercourse also on all days, and for a few days after, they noticed vaginal discharge. This resulted in a dramatic decrease in unintended pregnancies among these couples.
In the early 1960s, Dr. James Brown took a position at the Royal Women's Hospital in Melbourne, Australia. Dr. Brown had earlier developed the first tests to measure oestrogen and progesterone, and he used these tests to assist Dr. Billings in further study of the relationship between cervical mucus and fertility. Dr. Evelyn Billings joined the research team in 1965. By the late 1960s, the rules for identifying fertile days had been established and teaching centers began to be set up around the world. The method was called the Ovulation Method, to emphasize that the central feature of a woman's fertility cycle was ovulation, rather than menstruation. In the 1970s, a committee of the World Health Organization renamed it the Billings Ovulation Method.
Scientific verification of the Billings Method is ongoing. Dr. James Brown continued to study ovarian activity until his retirement in 1985. Dr. Erik Odeblad was acquainted with the Billings Ovulation Method in 1977, and reported that his research into the activity of the cervix confirmed all the conclusions made by Dr. Billings. Dr. Odeblad's research into the cervix and cervical mucus also continued for many decades.
Read more about this topic: Billings Ovulation Method
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