Human embryos under a microscope at an IVF clinic in La Jolla, Calif. Sandy Huffaker/Getty Images hide caption

itoggle caption Sandy Huffaker/Getty Images

Which one of these sunscreens would be considered safe and correctly labeled by the Food and Drug Administration? Not a single one. Safe sunscreens are SPF15 or higher, and the new rules require those with broad-spectrum protection to include the term next to and in the same style as the sun protection factor. Benjamin Morris/NPR hide caption

itoggle caption Benjamin Morris/NPR

A woman pours two tablets into her hand from a pill bottle. iStockphoto.com hide caption

itoggle caption iStockphoto.com

Isabel Doran, 4, gets a CT scan at Children's National Medical Center with her mom, Veronica Doran. The X-ray radiation in CT scans raises the risks for cancer, including leukemia, a new study shows. Dayna Smith/The Washington Post/Getty Images hide caption

itoggle caption Dayna Smith/The Washington Post/Getty Images

Amber Cooper lives in Modesto, Calif., with her 5-year-old son, Jaden, and her husband, Kevin. She had a liver transplant when she was 10 years old and has to take anti-rejection medication. Deanne Fitzmaurice for NPR hide caption

itoggle caption Deanne Fitzmaurice for NPR

Karlton Hill, 15, was diagnosed with diabetes when he was 12. He works hard to manage the disease: He jogs and does pushups every day; he takes metformin is very careful about what he eats. Leslie Capo/LSU Health Sciences Center hide caption

itoggle caption Leslie Capo/LSU Health Sciences Center

Bring on the caffeine — maybe. antwerpenR/Flickr.com hide caption

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Michelle Salvini (left) and Terri DiCarlo take a break from work outside the Cornerstone Care clinic in Burgettstown, Pa. Mysterious fumes have repeatedly sickened clinic staffers, forcing them to evacuate the building several times. Maggie Starbard/NPR hide caption

itoggle caption Maggie Starbard/NPR

Karen Lindsfor, a professor of radiology and chief of breast imaging at the University of California, Davis Medical Center, examines the mammogram of a patient with heterogeneously dense breast tissue. Lindfors is among those doctors who say there was insufficient evidence to support the idea that additional screenings would detect cancers earlier. Rich Pedroncelli/AP hide caption

itoggle caption Rich Pedroncelli/AP

Connor Galloway, age 12, was found dead in his bedroom with a belt looped around his neck. Connor's friends admitted to his mother that they'd been talking about playing "the choking game." Courtesy of the Galloway family hide caption

itoggle caption Courtesy of the Galloway family

This illustration shows a device made by MammoSite used to deliver targeted doses of radiation as part of brachytherapy. Courtesy Radiological Society of North America hide caption

itoggle caption Courtesy Radiological Society of North America