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CHICAGO, Aug. 22 (UPI) -- U.S. researchers say they have discovered a gene variation linked to an increased risk of premature birth among African-American women.
The study, reported online by the Proceedings of the National Academy of Science, focuses on a a gene that directs the production of collagen, a key component of the amniotic sac in a pregnant woman's uterus, the Chicago Tribune said.
Researchers said women with the variant gene are more prone to premature rupture of membranes. The ruptures are more common among African-Americans, as is…