In Australia, data for induced abortions (IA) is unreliable, although accurate information is essential for the development of policy and funding for services relating to IA. The rate of induced abortion was an incidental finding from questionnaire data collected for a longitudinal study of chlamydia in young women in Australia. We found a pregnancy rate of 7.2/100 woman years (95% confidence interval (CI): 5.7-9.0) (n=76) and IA rate of 2.1/100 women years (95% CI: 1.4-3.2) (n=22). Differences were found between States and Territories, information which might influence the development of services in regions of Australia.