Dr. Evelyn Billings and her husband, Dr. John Billings, began work in 1953 on a method of natural family planning which involved observation of changes to cervical mucus. Together they founded the World Organization of the Ovulation Method Billings (WOOMB) as the center for teaching the method throughout the world. Although John maintained his career as consulting neurologist to St Vincent's Hospital, he and Evelyn also spent a large part of each year travelling to other countries, and training teachers in the Ovulation Method, lecturing to doctors and students, and establishing teaching centres. The method pioneered by the Billings was approved by the Catholic Church and used by the World Health Organization, and it was the only natural method accepted by the Chinese government. In 2003 Evelyn was named a Dame of Malta. John and Evelyn had nine children.

Emmaus Road Books:
The Great Life: Essays on Doctrine and Holiness

Other Books:
The Billings Method (Anne O'donovan, 2003)