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(Reuters) - A study following more than 1.3 million premature babies born in Florida found that two-thirds of those born at only 23 or 24 weeks were ready for kindergarten on time, and almost 2 percent of those infants later achieved gifted status in school.
Such very prematurely born babies did score lower on standardized tests than full-term infants, but as the length of pregnancy increased, the differences in test scores became negligible, according to the study, conducted by Northwestern University and published on Monday in JAMA Pediatrics medical journal.
"What excites me about this study is that it changes the focus for the clinician and families at the bedside from just focusing on the medical outcomes of the child to what the future educational outcomes might be for a child born early," Craig Garfield, the first author of the study and an associate professor of pediatrics and medial social sciences at Northwestern Medicine, said in a statement.
Researchers analyzed the school performance of 1.3 million infants born in Florida from 1992 to 2002 who had a fetal development term of 23 to 41 weeks and who later entered the state's public schools between 1995 and 2012.
They found that babies born at between 23 and 24 weeks tended to have normal cognitive functions later in life, with 1.8 percent of them even achieving gifted status in school. During the time period the study covered, 9.5 percent of children statewide were considered gifted.
Premature birth happens when a baby is born before at least 37 weeks of pregnancy, according to the Centers for Disease Control and Prevention (CDC).
A normal pregnancy term is around 40 weeks, and a preterm birth can lead to serious medical problems, underdevelopment in early childhood or death for the infant.
The study does not account for why these extremely premature infants later performed well in school, Garfield said in the statement, and did not look at whether their success could be related to extra support from family or schools, or the children's biological make-up.
Reporting by Gina Cherelus; editing by Patrick Enright and Lisa Shumaker