While a twin pregnancy can often be a journey of wonder and excitement, it is a far more complicated pregnancy than what is involved for a single baby. The number of twin pregnancies has substantially increased since 2009 at Cork University Maternity Hospital, a trend which is reflected worldwide. Because the number of twins delivered each year is increasing so too are the number of associated complications cared for in our hospitals. In order for the doctors and midwives caring for these patients to provide the best care possible they must know what potential complications they are likely to encounter and how likely they are to encounter them. This will allow them to prepare the patients for what may occur and where possible try to prevent these from happening. My project will involve completing a comprehensive database of over 1,000 pregnancies to analyse what these complications are, how often they happen and when they happen. It will provide an evidence base for the patient centred care involved in twin pregnancies which is becoming more and more important as the number of twin pregnancies rises.