Salt Lake City Hospital Welcomes 10 Sets of Twins Over the Course of One Week

Ten sets of twins have been born at St. Mark's Hospital in Salt Lake City, Utah over the course of a week, including four sets within a 21-hour period.

Of the 59 babies at the hospital on Thursday of last week, 20 were twins.

Dr. Gary A. Dilby, director of maternal-fetal medicine at the hospital, says he has no idea why there were so many twins this week.

Typically twins make up about 1 percent of deliveries in the United States. At St. Mark's, that means two or three sets a month. But 10?

One St. Mark's doctor joked it was like being on Noah's Ark: "They keep coming, two by two."