Boys more likely to be born early
By LAURAN NEERGAARD
WASHINGTON — Boys are slightly more likely to be born premature than girls, and they tend to fare worse, too, said a new report on the health of the world’s newborns.
“This is a double whammy for boys,” said Dr. Joy Lawn of the London School of Hygiene & Tropical Medicine, who led the team of researchers. “It’s a pattern that happens all over the world.”
The gender difference isn’t large: About 55 percent of preterm births in 2010 were male, the report found. Nor is it clear exactly why it happens.
The finding comes from a series of international studies being published today that examine newborn health and prematurity. About 15 million babies worldwide are born too soon, most of them in Africa and parts of Asia where survival is difficult for fragile newborns. Globally, about 1 million babies die as a direct result of preterm birth and another million die of conditions for which prematurity is an added risk.
Today’s report offers some of the first estimates of how many preemie survivors go on to suffer certain disabilities, and found where these babies are born, and how early, determines their risk.
Overall, Lawn said about 7 percent of survivors have two of the most burdensome disabilities: neurologic-developmental impairment, ranging from learning disabilities to cerebral palsy, and vision loss.
But the biggest risk is to the youngest preemies, those born before 28 weeks gestation. Worldwide, 52 percent of them are estimated to have some degree of neurodevelopmental impairment, the report found.
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