He's not just getting a cold. He's building his microbiome. iStockphoto.com hide caption

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Eva Hu-Stiles virtually interacts with her grandmother. iPad assist by Elise Hu-Stiles. John W. Poole/NPR hide caption

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In a study of 4,000 pregnant women, fish accounted for only 7 percent of blood mercury levels. JackF/iStockphoto.com hide caption

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Sucking may be one of the most beneficial ways to clean a baby's dirty pacifier, a study found iStockphoto.com hide caption

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Renande Raphael, aged 16 months, is measured to check whether she is growing normally. She's part of a trial in Haiti to see if an extra daily snack of enriched peanut butter prevents stunting and malnutrition. Alex E. Proimos/via flickr hide caption

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I could use some shushing and swaddling right about now. iStockphoto.com hide caption

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