A 5-year study of the Billings Ovulation Method® with couples wishing to achieve pregnancy showed a known pregnancy rate of 78%. This study was conducted by Research Team of Ovulation Method Research and Reference Centre of Australia from 1999-2003. The pregnancy rate was 65% in sub-fertile couples and 66% in women aged over 38. Of the couples in the study who had previously attempted IVF or AI (artificial insemination) without success, 35% conceived naturally with the Billings Ovulation Method®.
Summary of Results
| Total Participants | 449 |
| Outcome known | 358 |
| Known pregnancy rate 278/358 | 78% |
| Women in the study classified as sub-fertile1 | 207 |
| Outcome known | 172 |
| Known pregnancy rate 111/172 | 65% |
| Women in the study over 38 years old | 65 |
| Outcome known | 48 |
| Known pregnancy rate 32/48 | 66% |
| Women in the study who had been unsuccessful with IVF/AI | 20 |
| Outcome known | 20 |
| Known pregnancy rate 7/20 | 35% |
| Average time trying to achieve for all couples before coming to Billings Ovulation Method™ clinic |
15 months |
| Average time from initial instruction in Billings Ovulation Method™ to conception |
4.7 months |
| Couples who were childless | 60% |
| Prior knowledge of signs of fertility | 18% |
93% stated they were satisfied and would recommend the Billings Ovulation Method® to others.
95% stated that the Billings Ovulation Method® gave an understanding of fertility and infertility.
1Trying to achieve a pregnancy for 12 months or more.