Signs of transposition of the great arteries may be detected during certain routine screening tests done during pregnancy. However, some people with congenitally corrected transposition of the great arteries may not have symptoms for many years. Signs and symptoms of transposition of the great arteries after birth include: 
Blue color of the skin (cyanosis)
Shortness of breath
Weak pulse
Lack of appetite
Poor weight gain
 A blue skin color may not be as noticeable in babies who are born with transposition of the great arteries and other congenital heart defects. This is because these other heart conditions — such as atrial septal defect, ventricular septal defect or patent ductus arteriosus — may allow some oxygen-rich blood to travel through the body. But as the baby becomes more active, the congenital heart defects won't allow enough blood through and eventually the blue skin color will become obvious.