Prof Thilaganathan heads up the newest Tommy's research centre, established in 2019 to tackle inequalities in maternity care and make the UK the safest place in the world to give birth. His expertise includes twin pregnancies, placenta function, and pregnancy complications such as pre-eclampsia and fetal growth restriction. He is also Director of Fetal Medicine and consultant obstetrician at St George’s University Hospital in London, where he leads the training programme for other clinicians to become specialists in his field. He's authored more than 250 peer-reviewed publications and is editor-in-chief of medical journal Ultrasound in Obstetrics & Gynaecology. In 2007, he was made a Fellow of the Royal College of Obstetricians and Gynaecologists, which he represents on the UK National Screening Committee.