Congenital Heart Disease Congenital Heart Disease According to the American Heart Association, about eight of every 1000 babies born in the United States has a congenital (present at birth) heart defect--a problem that occur...
Factors Contributing to Congenital Heart Disease Factors Contributing to Congenital Heart Disease What causes congenital heart disease? A congenital heart defect (CHD) is a heart problem which is present at birth, caused by improper development of ...
Fetal Circulation Fetal Circulation How does the fetal circulatory system work? During pregnancy, the fetal circulatory system works differently than after birth: The fetus is connected by the umbilical cord to the pl...