HEALTH

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Pregnant Teen
Teen birth rates have dropped by nearly half; experts attribute to a number of factors
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chickens, bird flu
Researchers study how the H7N9 flu virus spreads in ferrets to better understand how it might spread in people.
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Creating a cloned human embryo
Stem cell cloning paper contains problems, but scientist stands by work.
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A pregnant woman sits on a hillside near a city.
A hormone released by the placenta that is tied to stress and preterm birth may also predict which moms develop postp...
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A woman looks exhausted during her workout.
The 7-minute workout may seem great, but does it really work? Experts explain.
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April Gionfriddo with her son Kaiba , who was born with a rare condition that caused life-threatening breathing problems.
Using a 3D printer, researchers created a device that allowed a baby to breathe.
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