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

itoggle caption JackF/iStockphoto.com

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

itoggle caption Katherine Streeter for NPR

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. iStockphoto.com 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

itoggle caption Courtesy of the Infertility Center of St. Louis

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. iStockphoto.com hide caption

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