John Billings | |
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 | |
| Born | 5 March 1918 |
| Died | 1 April 2007 (aged 89) Richmond, Victoria |
| Nationality | Australian |
| Education | Xavier College |
| Alma mater | University of Melbourne |
| Occupation | Physician |
| Notable work | Jointly pioneered the natural method of family planning known as the Billings Ovulation Method |
Evelyn Livingston Billings | |
|---|---|
| Born | Evelyn Livingston Thomas 8 February 1918 |
| Died | 16 February 2013 (aged 95) Melbourne, Victoria |
| Nationality | Australian |
| Occupation | Physician |
| Notable work | Jointly pioneered the natural method of family planning known as the Billings Ovulation Method |
John Billings AM, KC*SG (5 March 1918 – 1 April 2007) and his wife, Evelyn Livingston Billings AM, DCSG (née Thomas; 8 February 1918 – 16 February 2013), were Australian physicians who pioneered the natural method of family planning known initially as the Ovulation Method, then the Ovulation Method Billings, specified by the WHO in 1978 and finally as the Billings Ovulation Method.