According to Marissa Selner and Marijane Leord, “the exact cause of certain birth defects are often unknown.” Birth defects can be genetic or even a result in bad life style choices. A defect can be present throughout the family history of one of the parents. Certain behaviors, like smoking and alcohol use increase the risk of birth defects. Some children experience some physical problems and some children show no physical problems according to Marissa Selner and Marijane Leord. The most common defects are feeding problems, difficulty breathing and seizures. Options such as blood tests and amniocentesis can help a person who have bad genetics. Most birth defects can be diagnosed at birth. Doctors can diagnose some birth defects with physical
