Complications associated with the diagnosis of Polycystic Ovarian Syndrome Researchers: Dr Roger Hart, Dr Dorota Doherty Polycystic Ovarian Syndrome (PCOS) is a common condition, occuring in approximately 1 in 12 women. It has been suggested that women with PCOS are at an increased risk of developing several medical conditions later in life. These conditions are believed to be infertility, diabetes, cardiovascular disease, and endometrial cancer. However it is unclear if women with PCOS are at an increased risk of developing conditions such as breast cancer. Using data linkage this project aims to confirm whether PCOS is related to developing these medical conditions later in life and whether babies born to these women are more likely to have birth defects.