Drs. Evelyn and John Billings are pictured in the garden of their home in Melbourne, Australia, in this 2004 file photo. John Billings, who with his wife pioneered a revolutionary church-backed method for couples to avoid or achieve conception, died April 1 in Richmond, Australia. By the time of his death, teaching centers on the Billings Ovulation Method of natural family planning had been established in more than 100 countries. (CNS photo/Peter Casamento) (April 5, 2007) See OBIT-BILLINGS April 4, 2007.