Miss Jeannie Yoon is a Consultant Obstetrician and Gynaecologist with a specialist interest in polycystic ovarian disease, menstrual disorders, PMT, hormone replacement therapy, menopausal disorders, and contraception. She has extensive experience in abnormal smears and colposcopy and spent three years at the Royal Marsden as a Cancer Research Campaign Fellow. Miss Yoon trained at St Thomas' and has worked at leading teaching hospitals, including St Thomas', Queen Charlotte's, Chelsea & Westminster, and the John Radcliffe in Oxford. She became fully private in 2006 and has published extensively on the diagnosis and management of high-risk pregnancies.