| http://www.w3.org/ns/prov#value | - Most prematurity is due to infection or other factors -- such as smoking -- that set off inflammatory chemicals that produce prostaglandins and trigger contractions, says Stephen Fortunato, M.D., director of maternal fetal medicine at the Women's Hospital at Centennial Medical Center, in Nashville, TN. Other causes include structural problems with the cervix or placenta or high blood pressure in t
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