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[Video] 10 Facts You Probably Didn’t Know About Twins

According to the National Center for Healthy Statistics, the twin birth rate in the US rose 76% from 1980 through 2009. This increase may be caused by the popularity of growth hormones in food, fertility drugs and in vitro fertilization techniques, where 21 out of 1,000 births are pairs. Twins, two babies produced by a […]