Jon Hyett is the Head of High Risk Obstetrics and a Senior Staff Specialist in Obstetrics and Maternal and Fetal Medicine at the Royal Prince Alfred Hospital, Sydney. He is also Clinical Professor in the Discipline of Obstetrics, Gynaecology and Neonatology at the University of Sydney and a member of the Sydney Institute for Women, Children and their Families. Jon is a trustee of the Fetal Medicine Foundation (UK) as well as of the International Society of Ultrasound in Obstetrics and Gynaecology – where he is also the current Chair of the Education Committee. Jon’s primary research interests include predictive modelling and preventative interventions for adverse obstetric outcomes. Many of these models are based on first trimester screening.