In many states throughout the world, infants routinely undergo newborn screening (NBS) for galactosemia. This allow a diagnosis to be made while the person is still an infant. Infants affected by galactosemia typically present with symptoms of lethargy, vomiting, diarrhea, failure to thrive, and jaundice. None of these symptoms are specific to galactosemia, often leading to diagnostic delays. If the family of the baby has a history of galactosemia, doctors can test prior to birth by taking a sample of fluid from around the fetus (amniocentesis) or from the placenta (chorionic villus sampling or CVS). Galactosemia is normally first detected through newborn screening which if available, is able to diagnose the majority of affected infants.