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Planned parenthood has important benefits for maternal and infant health. Monitoring and preventing unintended pregnancy is therefore an important public health goal. 1 In the only Australian national household survey about mistimed or unintended pregnancy (undertaken 2005), 18% of women of reproductive age (18e44 years) reported that their most recent pregnancy was mistimed, and a further 17% reported that the pregnancy was unwanted. 2

We undertook a contemporary national population survey to assess the prevalence and outcomes of unintended pregnancy during the preceding ten years. Trained female interviewers (Hunter Valley Research Foundation) undertook a national random computerassisted telephone (mobile and landline) survey (weekdays, 9 ame8 pm) during December 2014 e May 2015. Women aged 18e45 years with adequate English were asked whether they had had an unintended pregnancy during the past ten years, and whether any unintended pregnancy was unwanted. We also asked about the outcomes of all pregnancies. A population sample size of 2000 was required to detect a prevalence of unwanted pregnancy of 10e50% with 90% power. La Trobe University Human Research Ethics Committee approved the study (reference, 14-075).