Galactosemia is found through a simple blood test. The test measures
the amount of enzyme in each baby's blood. All babies with
galactosemia have decreased levels of this enzyme. The different
amount of enzyme activity might account for some of the differences in
the long-term problems seen between patients. In California, this test is
done on babies soon after birth through the State Newborn Screening
Program. Each year, about 6 to 9 babies are born in California with this
disorder. It is found equally in both boys and girls