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In a study of 4,000 pregnant women, fish accounted for only 7 percent of blood mercury levels. JackF/ hide caption

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That's how it's supposed to work. But for most new moms, breast-feeding doesn't come easily, a study finds. hide caption

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Does a glass or two of wine during pregnancy really increase the child's health risks? Epigenetics may help scientists figure that out. Katherine Streeter for NPR hide caption

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Pregnant doctors are less likely than other women to deliver their babies via C-section, recent research suggests. Economists say that may be because the physician patients feel more empowered to question the obstetrician. hide caption

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A midwife holds a newborn at Rabia Balkhi Women's Hospital in Kabul, Afghanistan. Jonathan Saruk/International Medical Corps hide caption

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The baby's going to be fine, but what about your pocketbook? hide caption

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Doctors use tissue slides like this one of the ovary's outer cortex to confirm a woman's ovarian reserve. It's also the the ovary tissue that's removed in an ovarian transplant. Courtesy of the Infertility Center of St. Louis hide caption

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By sequencing a newborn's genome, doctors could screen for more genetic conditions. But parents could be confronted with confusing or ambiguous data about their baby's health. hide caption

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