Before birth, an obstetric ultrasound scan may be used to screen pregnant women for signs of CHD in their unborn babies. This screening scan is often performed around 20 weeks of pregnancy when the fast moving structures of the fetal heart are large enough to be more easily imaged.  
If CHD is suspected, a mother will be referred for a fetal echocardiograph, which is a more detailed, diagnostic ultrasound scan by a specialist cardiologist. 
It is increasingly possible for specialists to screen for CHD as early as 14 weeks, if CHD is suspected from other factors, such as a family history.
Antenatal detection and diagnosis
Peripartum mood disturbances interventions
Prenatal diagnosis
Failure to thrive primary prevention
Birth control
Gestational diabetes medical therapy
Neoplastic meningitis screening
Gestational diabetes classification