Horseshoe kidney when the 2 kidneys join (fuse) together at the bottom to form a U shape like a horseshoe.
Hypoplastic left heart syndrome (HLHS) is a group of defects of the heart and large blood vessels. A child is born with this condition (congenital heart defect). It occurs when part of the heart doesn't develop as it should during the first 8 weeks of pregnancy.
Intestinal malrotation is a birth defect. It happens when your baby’s intestinal tract doesn’t form as it should during pregnancy. Malrotation happens when your baby’s intestine doesn’t turn like it should.
A lymphatic malformation is a lymphatic vessel that isn’t formed right. The malformations are lymphatic tissue filled with fluid (cyst). Your child may have one or more of these cysts.
Meckel diverticulum is a small pouch in the wall of the intestine. It’s near where the small and large intestines meet. This condition is the most common birth defect of the digestive system. It happens to about 1 in 50 babies.
Microcephaly is a condition where a baby's head is much smaller than normal. It is most often present at birth (congenital). Most children with microcephaly also have a small brain and an intellectual disability. Some children with small heads have normal intelligence.
Congenital torticollis means that a baby is born with an odd position of the neck. The odd position is because of a tight, short neck muscle. It affects the right side more often than the left side. It may range from mild to severe. The condition is sometimes called wryneck.
Information on numerical abnormalities, including an overview on trisomies and monosomies
Detailed information on physical abnormalities of high-risk newborns
Genetic changes come in two main types: chromosome abnormalities and single-gene defects.
A child with prune belly syndrome often can't completely empty his or her bladder. This can cause serious bladder, ureter, and kidney problems.
Pulmonary atresia (PA) is a heart defect. It happens when the fetal heart doesn’t form as it should during the first 8 weeks of pregnancy.
Pulmonary stenosis is a birth defect of the heart (congenital). It can happen when the pulmonary valve doesn’t develop as it should during the first 8 weeks of pregnancy. The pulmonary valve connects the right ventricle to the pulmonary artery.
Tetralogy of Fallot is 4 congenital heart defects. This means that your child is born with them. These 4 problems occur together (tetralogy refers to 4).
A thyroglossal duct cyst is a pocket in the front part of neck that is filled with fluid. A child is born with this cyst.
Total anomalous pulmonary venous return (TAPVR) is a congenital heart defect. This means that your child is born with it. It happens as the baby’s heart develops during the first 8 weeks of pregnancy.
Transposition of the great arteries (TGA) is a type of congental heart defect. This means that your baby is born with it. In this condition, the large blood vessels that carry blood from the heart to the lungs and body aren’t connected as they should be.
Tricuspid atresia (TA) is a heart defect present at birth (congenital). It occurs when the tricuspid valve doesn’t form right during fetal heart development. This happens during the first 8 weeks of pregnancy. The tricuspid valve is located between the right upper chamber (atrium) and the right lower chamber (ventricle) of the heart. The defect keeps blood from flowing normally from the right atrium to the right ventricle.
Truncus arteriosus is a heart defect that is present at birth (congenital). It occurs when there is an abnormal connection between the aorta and pulmonary artery. Normally, the aorta and the pulmonary artery are separate.
A ventricular septal defect (VSD) is a congenital heart defect. This means that your baby is born with it. A VSD is an opening or hole in the dividing wall (septum) between the 2 lower chambers of the heart (right and left ventricles). VSDs are the most common type of congenital heart defect.
Detailed information on vision and hearing in newborns
Detailed information on birth injury, including the most common types of birth injury
Low birth weight is a term used to describe babies who are born weighing less than 5 pounds, 8 ounces (2,500 grams). An average newborn usually weighs about 8 pounds. A low-birth-weight baby may be healthy even though he or she is small. But a low-birth-weight baby can also have many serious health problems.
Very low birth weight is a term used to describe babies who are born weighing less than 3 pounds, 4 ounces. It is very rare that babies are born this tiny. Only about 1 in 100 babies born in the U.S. are very low birth weight.
Detailed information on bites, including human bites, animal bites, and insect bites