Prof. TG Teoh is a consultant obstetrician and gynaecologist, specialising in maternal and fetal medicine. He practices at the Lindo Wing at St Mary's Hospital and the Portland Hospital for Women and Children. Additionally, he holds the position of Professor of Obstetric Practice at Imperial College London.

Prof. Teoh completed his medical training at the National University of Ireland and was appointed as a consultant at St Mary's Hospital in 1997. He played a pivotal role in establishing the hospital's obstetric medicine service, as well as the obstetric perineal and prematurity clinics. Furthermore, he set up and served as the clinical lead for the Maternal and Fetal training programme.

In addition to his consultancy work, Prof. Teoh is actively involved in clinical research, with a particular focus on prematurity and medical diseases in pregnancy. He is a member of the preterm parturition group at the Institute of Reproductive and Developmental Biology and the National Clinical Reference Group for Specialist Commissioning on Maternity Services. He also serves as the Clinical Director of the Royal College of Obstetricians and Gynaecologists.

Prof. Teoh's areas of expertise include antenatal care, childbirth (both assisted and normal delivery), early pregnancy care, early pregnancy scans, postnatal care, premature birth services, pre-pregnancy counselling, and ultrasound. He is adept at managing conditions such as ectopic pregnancy, multiple pregnancy, and premature labour.

Since his appointment in 1997, Prof. Teoh has been dedicated to advancing the field of obstetrics and gynaecology, ensuring the highest standards of care for his patients.