Study: Hormone Helps Prevent Premature Births Nearly 12 percent of all live births are premature and the newborns at risk for serious medical problems. But researchers find a hormone -- progesterone -- that significantly lowers rates of early births. Hear NPR's Michele Norris and Dr. Paul Meis, professor of obstetrics and gynecology at Wake Forest University.

Study: Hormone Helps Prevent Premature Births

Study: Hormone Helps Prevent Premature Births

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Nearly 12 percent of all live births are premature and the newborns at risk for serious medical problems. But researchers find a hormone — progesterone — that significantly lowers rates of early births. Hear NPR's Michele Norris and Dr. Paul Meis, professor of obstetrics and gynecology at Wake Forest University.