HIV-positive babies rest in an orphanage in Nairobi, Kenya. Treatment right after birth may make it possible for HIV-positive newborns to fight off the virus. Brent Stirton/Getty Images hide caption

itoggle caption Brent Stirton/Getty Images

Very few girls get the recommended 60 minutes of exercise daily. But physical activity could help with school, a study says. evoo73/Flickr hide caption

itoggle caption evoo73/Flickr

Play now, pay later: consistency matters when it comes to kids and sleep. iStockphoto.com hide caption

itoggle caption iStockphoto.com

Jonathan Noyes started binging on food after a stressful period in his family's life, including his father's job loss and his grandmother's cancer. Maggie Starbard /NPR hide caption

itoggle caption Maggie Starbard /NPR

The Clinical Center at the National Institutes of Health in Bethesda, Md. National Institutes of Health hide caption

itoggle caption National Institutes of Health

Cellist Matt Haimovitz made it big in the classical music scene as a little kid. Stephanie Mackinnon hide caption

itoggle caption Stephanie Mackinnon

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

itoggle caption iStockphoto.com

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

Scoliosis didn't keep golfer Stacy Lewis from becoming a top-ranked pro. She spent almost eight years wearing a back brace, yet still had to have surgery. Jonathan Ferrey/Getty Images hide caption

itoggle caption Jonathan Ferrey/Getty Images

Teenagers put in more than two hours a day of TV time on average, still more than what pediatricians say is healthy. iStockphoto.com hide caption

itoggle caption iStockphoto.com