A health worker with Doctors Without Borders carries a child suspected of having Ebola at the treatment center in Paynesville, Liberia, last October. Ebola is especially deadly for young children and babies. About 4 in 5 infected died. John Moore/Getty Images hide caption

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The ParaGuard IUD, which releases copper into the uterine cavity, can last up to 10 years. In clinical studies, the pregnancy rate among women using the device was less than 1 pregnancy per 100 women annually. Mark Harmel/Science Source hide caption

itoggle caption Mark Harmel/Science Source

Mary Harris was relieved when Stella was born with a mop of thick black hair, as if she had been protected from the chemo somehow. Howard Harris hide caption

itoggle caption Howard Harris

The number of children who need glasses has risen quickly across East Asia and Southeast Asia. But some parents and doctors in China are skeptical of lenses. They think glasses weaken children's vision. Imaginechina/Corbis hide caption

itoggle caption Imaginechina/Corbis

Chef David Iott explains the perfect way to prepare risotto to Stanford students. Courtesy of Stanford's Residential and Dining Enterprises hide caption

itoggle caption Courtesy of Stanford's Residential and Dining Enterprises

Emily Neblett, a patient at the Monroe Carell Jr. Children's Hospital in Nashville, Tenn., demonstrates circuit pieces from the mobile maker space that are connected by magnets. Noah Nelson/Youth Radio hide caption

itoggle caption Noah Nelson/Youth Radio

Research into how the human brain develops helps explain why teens have trouble controlling impulses. Leigh Wells/Ikon Images/Corbis hide caption

itoggle caption Leigh Wells/Ikon Images/Corbis

Rhett Krawitt, 6, outside his school in Tiburon, Calif. Seven percent of the children in his school are not vaccinated. Courtesy of Carl Krawitt hide caption

itoggle caption Courtesy of Carl Krawitt

A marijuana bud displayed in Denver. Don't legalize pot, the pediatricians say, but don't lock teenagers up for using it, either. Seth McConnell/The Denver Post/Getty Images hide caption

itoggle caption Seth McConnell/The Denver Post/Getty Images

Ultrasound is often used for prenatal screening. It's just one of several prenatal screenings available to pregnant women. iStockphoto hide caption

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A baked potato with toppings on a lunch tray at a school in Wisconsin. Students are less likely to eat fruits and vegetables if they're rushing to get to recess, researchers say. Micheal Sears/MCT/Landov hide caption

itoggle caption Micheal Sears/MCT/Landov

Dr. Stephen Teach helps Jeffery Ulmer listen to his daughter Alauna's asthmatic breathing at Children's National Medical Center in Washington, D.C. Alauna's mother, Farisa, holds her. The District has one of the highest rates of pediatric asthma in the country. Jahi Chikwendiu/Washington Post hide caption

itoggle caption Jahi Chikwendiu/Washington Post

The Juvenile Justice Delinquency and Prevention Act allocates grant money to states, which are supposed to protect young offenders and make sure they're not housed with adult criminals. Whistleblowers say they've spent years flagging problems with the programs. David Goldman/AP hide caption

itoggle caption David Goldman/AP