Multiple Births or Multiple Gestation
Multiple births are much more common today than they were in the past. According to the U.S. Department of Health and Human Services, the twin birth rate has increased over 50% since 1980, and triplet, quadruplet, and higher order multiple births have increased at an even higher rate. There are more multiple births today in part because more women are receiving infertility treatment, which carries a risk of multiple pregnancy.
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