The heart is one of the first organs to form in the developing baby or fetus. It is completely formed by the eighth week of pregnancy. 

Routine ultrasounds during pregnancy include an examination of the heart; however, additional detailed imaging of the heart is sometimes needed. Ultrasound assessment of the fetal heart is usually carried out around 18 to 20 weeks of pregnancy. This detailed ultrasound, known as a fetal echocardiogram, uses sound waves to take pictures of the baby’s heart before birth.

Information about the baby before birth (antenatal) can give parents and health care professionals valuable direction for making decisions about the delivery and care of the baby after birth. Since most congenital heart disease is treatable, antenatal diagnosis can help the family prepare for the arrival of their child.​

Please visit the BC Women's Hospital Website for more information on Fetal ​Assessment.​

"Knowing But Not Knowing" is an educational booklet developed by members of the Children's Heart Centre for families experiencing an antenatal diagnosis of child heart disease. This resource is available in the Resource Centre.