2. Tetralogy of Fallot Tetralogy of Fallot(fuh-LOE) is a rare condition caused by the combination of four heart defects that are present at birth. These defects, which affect the structure of the heart, cause oxygen-poor blood to flow out of the heart and into the rest of the body. Infants and children with tetralogy of Fallot usually have blue-tinged skin because their blood doesn't carry enough oxygen. Tetralogy of Fallot is often diagnosed during infancy or soon after. However, tetralogy of Fallot may not be detected until later in life, depending on the severity of the defects and symptoms. With early diagnosis followed by appropriate treatment, most children with tetralogy of Fallot live relatively normal lives, though they'll need regular medical care and may have restrictions on exercise.
39. Causes A patent ductusarteriosus that doesn't close on its own is more common in premature babies, but rare in infants born at full term. As a baby develops in the womb, a vascular connection (ductusarteriosus) between two major blood vessels leading from the heart — the aorta and pulmonary artery — is a normal and necessary part of your baby's blood circulation while in the womb. But, this connection is supposed to close within two or three days after birth once the newborn's heart adapts to life outside the womb. In premature infants, the connection often closes on its own within a few weeks of birth. But if it remains open, it's referred to as a patent ductusarteriosus. The abnormal opening causes too much blood to circulate to the lungs and heart. If not treated, the blood pressure in the lungs may increase (pulmonary hypertension) and the heart may weaken. Congenital heart defects arise from problems early in the heart's development — but there's often no clear cause. Genetics and environmental factors may play a role.
59. Avoid risks. These include harmful substances such as alcohol, cigarettes and illegal drugs. Also, avoid X-rays, hot tubs and saunas.
60. Avoid infections. Be sure you are up to date on all of your vaccinations before becoming pregnant. Certain types of infections can be harmful to a developing baby.
61. Keep diabetes under control. If you have diabetes, work with your doctor to be sure it's well controlled before and after getting pregnant.