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This is Scientific American 60-Second Health, I'm Dina Fine Maron. Got a minute?

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When it comes to feeling safe and warm, there's nothing like being tightly bundled up in blankets.

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And snugly swaddling for babies is on the rise,

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it can sooth excessive crying and help induce sleep.

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Nine out of 10 infants in North America are swaddled in the first six months of life,

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and the demand for swaddling clothes soared by 61 percent in the U.K.between 2010 and 2011.

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But there's a downside to the resurgence of traditional swaddling,

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where the arms are restrained and the legs are stretched out:

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fears that it will fuel developmental hip problems in babies, known to be linked to the technique.

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Swaddling can force the hips to straighten and shift forward, causing misalignment.

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Which can boost the risk of osteoarthritis and the need for hip replacement in middle age.

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That's according to a report in Archives of Disease in Childhood.

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These issues do not mean we need to drop swaddling altogether.

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It can be safe as long as the swaddling allows a baby's legs to bend up and out at the hips, allowing the hip joints to develop normally.

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With that in mind, infants and their parents can rest easy.

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Thanks for the minute, for Scientific American 60-Second Health. I'm Dina Fine Maron.

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