Congenital Hip Dysplasia
What is Congenital Hip Dysplasia? Congenital dislocation of the hip, also called congenital hip dysplasia, is a birth defect where the femoral head does not sit properly in the hip…

Birth Defect Research for Children
The National Birth Defect Registry needs families like yours. By joining, you help researchers find causes, prevent future cases, and improve treatments.
What is Congenital Hip Dysplasia? Congenital dislocation of the hip, also called congenital hip dysplasia, is a birth defect where the femoral head does not sit properly in the hip…
What is Hydrocephalus? Hydrocephalus is a Greek word that means, waterhead. Hydrocephalus is an abnormal build up of cerebrospinal fluid (CSF) in the brain that causes ventricles to enlarge and…
What is Hypoplastic Left Heart Syndrome? Hypoplastic left heart syndrome is a congenital heart defect where the left ventricle, mitral valve, aortic valve, and ascending aorta are underdeveloped or absent,…
What is Holoprosencephaly (HPE)? Holoprosencephaly is a serious brain defect that occurs during the first few weeks after conception. In HPE, the forebrain of the developing embryo does not divide…
What is Hemihypertrophy? Hemihypertrophy is characterized by a greater than normal (5%) difference in size between the right and left sides of the body. The difference can be in only…
What are Hemangiomas? Hemangiomas are benign vascular tumors (a collection of tiny blood vessels) that occur in 2 to 3 percent of all infants. Although hemangiomas may not be visible…
What Are Heart Defects? The heart is a pump made of muscle that is divided into four chambers. Blood is pumped into these chambers through four valves that open and…
What Is Hearing Loss? Right from birth, babies explore their new world through sound . . . their mother’s voice, household sounds, noises outside. The stimulation babies receive from the…
What Are Growth Disorders? Growth disorders are problems in infants, children, and teenagers that prevent them from attaining realistically expected growth. These disorders include failure to gain height and/or weight in…
What Is Goldenhar Syndrome? Goldenhar syndrome, also known as oculo-auriculo-vertebral spectrum or hemifacial microsomia, is a rare congenital disorder featuring abnormal prenatal development of the face, ears, jaw, eyes, and…

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