The Institute of Medicine is reviewing how chronic fatigue syndrome is diagnosed and whether that label puts too much emphasis on fatigue over other significant symptoms. Daniel Horowitz for NPR hide caption

itoggle caption Daniel Horowitz for NPR

Some men take testosterone hoping to boost energy and libido, or to build strength. But at what risk? iStockphoto hide caption

itoggle caption iStockphoto

A mouse embryo grows from stem cells made by stressing blood cells with acid. The blood cells are tagged with a protein that creates green light. Courtesy of Haruko Obokata hide caption

itoggle caption Courtesy of Haruko Obokata

People practice yoga at a fundraiser for a breast cancer foundation in Hong Kong. Ed Jones/Getty Images hide caption

itoggle caption Ed Jones/Getty Images

Erick Munoz, flanked by lawyers, walks to 96th District Court last Friday. A judge ordered a Texas hospital to remove life support from his wife, Marlise. Tim Sharp/AP hide caption

itoggle caption Tim Sharp/AP

Eighty percent of college students drink, and schools have had little success reducing those numbers, or the problems caused by excessive alcohol. Toby Talbot/AP hide caption

itoggle caption Toby Talbot/AP

Clinical specialist Catey Funaiock took notes while observing a 5-year-old boy at the Marcus Autism Center, part of Children's Healthcare of Atlanta, in September. David Goldman/AP hide caption

itoggle caption David Goldman/AP

Amanda Gerety, a staff nurse at Boston Medical Center, checks monitors that track patients' vital signs. Fewer beeps means crisis warnings are easier to hear, she says. Richard Knox/NPR hide caption

itoggle caption Richard Knox/NPR

Alice Snyder, with her parents Mary and Ryan, during a checkup with Dr. John Herzenberg, who treated her clubfoot without surgery. Jenny Gold/Kaiser Health News hide caption

itoggle caption Jenny Gold/Kaiser Health News

Insurers still charge copays for some contraceptives. Laura Garca/iStockphoto hide caption

itoggle caption Laura Garca/iStockphoto

You tried burping. You tried bouncing. You tried swaddling. Now what? iStockphoto hide caption

itoggle caption iStockphoto

The chemicals in home wart-freezing treatments are flammable, the Food and Drug Administration warns. Courtesy of FDA hide caption

itoggle caption Courtesy of FDA

The prescription painkiller sold under the brand-name Vicodin contains hydrocodone bitartrate and acetaminophen. To reduce the risk of liver damage, the Food and Drug Administration is moving to limit the amount of acetaminophen allowed in prescription medicines. Toby Talbot/AP hide caption

itoggle caption Toby Talbot/AP