Today is the last day of Congenital Heart Defects Awarenes Week. The above flyer is from Little Hearts, and they also have an information sheet here with some usefull information about CHDs, the most common type of birth defect.
There are many 35 types of CHDs, and sadly most don't show signs or symptoms. A few signs or symptoms that might present, as listed on Mended Little Hears are
Rapid breathing
Cyanosis (bluish coloring of the tongue, lips, skin and/or fingernail beds)
Fatigue (note that most babies sleep a lot, but more than “normal” fatigue or tiredness may indicate a heart defect or other medical issue)
Poor feeding
Poor weight gain
If your infant presents with one of these issues, please take them to a physician.