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).