At a Los Angeles media briefing in 2010, Mariah Bianchi describes how her own case of whooping cough caused the death of her newborn son. Reed Saxon/AP hide caption

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Currently, you need a doctor's prescription to purchase emergency contraception, such as Plan B, if you are under 17. AP hide caption

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A baby hatch that is fixed in a window at Waldfriede Hospital in Berlin. Mothers can bring unwanted babies and leave them anonymously. Baby boxes are a revival of the medieval "foundling wheels," where unwanted infants were left in revolving church doors. Markus Schreiber/AP hide caption

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Girls line up at the Bernalillo County Juvenile Detention and Youth Services Center in Albuquerque, N.M. Jenny Gold/NPR hide caption

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Six percent of teenagers say they've used steroid drugs in the past year, according to a study in the journal Pediatrics. hide caption

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Chinese schoolchildren during lessons at a classroom in Hefei, east China's Anhui province, in 2010. STR/AFP/Getty Images hide caption

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When they eat out at a restaurant, kids consume more calories than they do at home. Here, members of the Long Island Gulls hockey team enjoy a lunch at TGI Friday's back in 2007 in Marlborough, Mass. Bruce Bennett/Getty Images hide caption

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Each dot represents one case of mumps between late June 2009 and late June 2010. The New England Journal of Medicine hide caption

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Two boys study together at a Chicago yeshiva in 2009. Public health officials say this type of close physical contact caused a mumps outbreak to spread throughout several orthodox Jewish communities in and around New York City. M. Spencer Green/AP hide caption

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An image of researchers at Oregon Health & Science University removing the nucleus from the mother's cell before it's inserted into the donor's egg cell. Courtesty of Oregon Health & Science University hide caption

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