Garrett shares a moment with his mother, Natalie Peterson. "He has been doing so good," she says. "He's been smiling." Nicole Haley/University of Michigan Health System hide caption

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Doctors Use 3-D Printing To Help A Baby Breathe
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In some human diseases, the wrong mix of bacteria seems to be the trouble. Getty Images hide caption

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Mix Of Gut Microbes May Play Role In Crohn's Disease
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Genetic Sequencing May Not Be Ready To Become Routine
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The new test scans a mother's blood for bits of a fetus's DNA. iStockphoto hide caption

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Blood Test Provides More Accurate Prenatal Testing For Down Syndrome
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Up till now, all babies have had two genetic parents. That could soon change. Klöpper & Eisenschmidt GbR/iStockphoto hide caption

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Scientists Question Safety Of Genetically Altering Human Eggs
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More Findings, More Questions About Value Of Mammograms
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Dennis Aabo Sorensen tests a prosthetic arm with sensory feedback in a laboratory in Rome in March 2013. Patrizia Tocci/Lifehand 2 hide caption

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An Artificial Arm Gives One Man The Chance To Feel Again
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Smoking can mess up your looks, according to an ad campaign aimed at keeping teens from smoking. Courtesy of U.S. Food and Drug Administration hide caption

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Wanna Smoke? It Could Cost You A Tooth, FDA Warns Teens
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Playing outside can help kids — and their parents — maintain a healthy weight. iStockphoto hide caption

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Adult Obesity May Have Origins Way Back In Kindergarten
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Rosetta On Course To Achieve Historic Mission
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You tried burping. You tried bouncing. You tried swaddling. Now what? iStockphoto hide caption

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Can Probiotics Help Soothe Colicky Babies?
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Patients, Consumer Advocates Question Hip Implant Settlement
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FDA Weighs Restrictions, Possible Ban On Menthol Cigarettes
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FDA Tells Company To Stop Selling Genetic Test
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