Approximately 5% of children born every day in Australia have a parent that underwent some form of Assisted Reproductive Medical (ARM) treatment. Gamete donation and reproductive medicine are an ever growing medical space, and choosing to have a child is arguably the largest personal economic decision we can make in our lifetime. Behavioural economics is well placed to explore the complex interaction of biological, economic, psychological, cognitive and personality factors at play when men and women make this large scale decision to engage in reproductive medical procedures. The BEST Centres program of research “The Economics of Fertility” explores some of the key decision processes involved in ARM such as factors that impact donor selection, and the preferences and behaviours of those who chose to explore non-clinical alternatives (the internet) to find their sperm or egg donor.