The rates of severe sepsis and fatal sepsis during childbirth in the U.S. rose by about 10% annually from 1998 to 2008, and many of the cases involved no known risk factors, according to a study in the journal Anesthesia & Analgesia. An analysis of national data found that severe sepsis was reported in about 1 in 11,000 cases of labor while fatal sepsis occurred in about 1 in 106,000 cases. Better detection is needed for all women during childbirth, even those with no known risk factors, researchers said.

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