A rare disease known as Down Syndrome is killing more than 200,000 babies in the U.S. according to a study released Wednesday.
The study also found that babies born with the condition have more severe behavioral problems and are at increased risk of developing autism.
Down Syndrome can cause developmental problems in babies, including language and behavioral difficulties.
The latest study from researchers at the University of Texas Health Science Center at Houston examined data from more than 12,000 children in the United States between 2009 and 2016.
They analyzed data on 1,000 of the babies born from 2011 to 2014 and more than 1,100 of the infants born in the 2015 to 2016 period.
The researchers also looked at data from 4,500 of the children born between 2010 and 2015.
The data revealed a number of patterns.
For example, the study found that nearly 20 percent of Down Syndrome babies have a low birth weight, which is a measure of how far a baby is from being a full-term baby.
About 11 percent of babies born in 2012 had a low weight.
About 15 percent of those babies have learning disabilities.
And about 20 percent have autism spectrum disorders, a neurological condition that can cause problems with communication and social skills.
The babies who have learning or behavioral problems are more likely to have Down Syndrome, the researchers said.
The findings suggest that Down Syndrome could be one of the main causes of autism, said lead researcher Dr. David Haggerty, a professor of pediatrics at UTHealth.
He added that the findings could help prevent the birth of more Down Syndrome children.
The authors of the new study, published in the Journal of the American Academy of Child and Adolescent Psychiatry, said the findings were similar to the findings of a previous study that found babies born to mothers with Down Syndrome had a higher risk of autism spectrum disorder.
The other researchers who contributed to the study were Susan G. Kobert, M.D., Ph.
D. and Mary R. McDevitt, Ph.
M., from the UTHealth Health Science Centers at Houston, and Dr. James C. Cone, M .
D., M.P.H. from the University Health Network in Houston.