Indication for Referral: In the GDM group, GDM was the most common indication for referral (n=506), (Figure 1). Other referral reasons included: ‘inadequate views of the fetal heart’ (n=4) which was defined as an inability to achieve the normal screening views of the fetal heart during the obstetric fetal anomaly scan [15]; family history of CHD (n=11); raised nuchal translucency (NT) (n=4); suspected CHD (n=9); fetal abnormality (n=3); fetal drug exposure (n=1) and fetal arrhythmia (n=5) (Figure 1). GDM