Introduction
It is widely reported that women with pre-gestational diabetes
mellitus, in particular those with Type 1 diabetes mellitus (DM), have an
increased risk of having a child with congenital abnormalities, including
congenital heart disease (CHD) [1-4]. In a previous publication we
reported that 3.1% of women with Type 1 diabetes mellitus referred
to our unit for fetal echocardiography between 1990-1994, had a baby
with CHD [5].