Good news for the nation's babies: Nearly 90 percent of newborns are getting tested for a host of rare but devastating genetic disorders.
Since 2004, specialists have urged that every U.S. newborn be checked for 29 conditions.
The goal is to detect the few thousand who will need early treatment to avoid death, retardation or other serious problems.
A March of Dimes report released Wednesday says 40 states now require testing for more than 20 of those disorders.
Three states, West Virginia, Kansas and Montana, passed legislation this year requiring checks for all 29 disorders, but that expanded testing hasn't yet begun.