Early detection of isolated severe congenital heart defects is associated with a lower threshold to terminate the pregnancy.

Prenatal detection rates of isolated severe CHD and termination of pregnancy rates were higher in the group with a first- and second trimester scan. We found no differences between timing of terminations. The additional time after diagnosis allows for genetic testing and for optimal counselling of expectant parents regarding prognosis and perinatal management so that well-informed decisions can be made.