In 2012 and 2013, 17,010 women aged 18-23 years old were enrolled in the 1989-95 cohort. Women were mainly recruited using the internet and social media platforms. Consistent with the other cohorts, women were required to have a Medicare card. Women completed the online survey and provided consent to linkage of survey data with administrative databases such as Medicare. Unlike the original cohorts, the 1989-95 cohort have been surveyed annually. There was a steep decline in response at the cohort’s second survey in 2014 (down to 70% of respondents from the baseline survey), but the response rate appears to have plateaued at around 55%-60% for subsequent surveys.