1 in 30

Number of babies born in the U.S. in 2009 who was a twin, compared with 1 in 53 babies in 1980. The increase is the result of women having children later in life and using fertility treatments like IVF more often. “With multiple births, though, there are greater health risks,” said Michigan State researcher Barbara Luke. “Continued research is necessary to improve outcomes.” [via Michigan State University]

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