In India, the politicisation of sex selective abortion has resulted in legislative measures designed to prevent the misuse of ultrasound for purposes of sex determination during pregnancy. In Australia, however, sex determination remains a largely unregulated component of routine ultrasounds during pregnancy. As an anthropologist, what I find interesting about this contrast is not that India “needs” regulation more than Australia, but that it is revealing of the assumptions surrounding people’s use of ultrasound in these respective cultural landscapes.