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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

Harvard University student Elana Simon introduces President Obama before he spoke at the White House Friday about an initiative to encourage research into more precise medicine. Mandel Ngan/AFP/Getty Images hide caption

itoggle caption Mandel Ngan/AFP/Getty Images

Augustine Goba (right) heads the laboratory at Kenema Government Hospital in Sierra Leone. He and colleagues analyzed the viral genetics in blood samples from 78 Ebola patients early in the epidemic. Stephen Gire/AP hide caption

itoggle caption Stephen Gire/AP

A scorpion fly perches on a leaf at the research farm where Lindgren studied the decomposition of human remains. Scorpion flies are among the first insects to visit a corpse. Courtesy of Natalie Lindgren hide caption

itoggle caption Courtesy of Natalie Lindgren

Biologist Rob Knight, co-founder of the American Gut Project, recently moved the project to the University of California, San Diego's School of Medicine. Casey A. Cass/University of Colorado hide caption

itoggle caption Casey A. Cass/University of Colorado

Bruno Mbango Enyaka gets his flu shot at a community health center in Portland, Maine, on Jan. 7. Gabe Souza/Press Herald via Getty Images hide caption

itoggle caption Gabe Souza/Press Herald via Getty Images

U.S. funding for medical research by source, 1994-2012. (Data were adjusted to 2012 dollars using the Biomedical Research and Development Price Index.) American Medical Association hide caption

itoggle caption American Medical Association

Women with the National Latina Institute for Reproductive Health demonstrate Wednesday outside the 5th U.S. Circuit Court of Appeals in New Orleans. A federal appeals court in New Orleans is considering whether a Texas law puts up an unconstitutional obstacle to women seeking abortions. Jonathan Bachman/AP hide caption

itoggle caption Jonathan Bachman/AP

The human papilloma virus causes most — but not all — cases of cancer of the cervix. James Cavallini/ScienceSource hide caption

itoggle caption James Cavallini/ScienceSource

By measuring activity in different parts of the brain, neuroscientsts can get a sense of how some people will respond to treatments. John Lund/Getty Images hide caption

itoggle caption John Lund/Getty Images

Dr. Richard Schlegel and postdoctoral fellow Nancy Palechor-Ceron use a microscope to look at human epithelial cells growing on mouse fibroblasts at Georgetown University Medical Center. Lauren Wolkoff/Georgetown University hide caption

itoggle caption Lauren Wolkoff/Georgetown University