After decades-long increase, number of twins born around U.S. on decline, CDC data says

“Double-trouble” may have peaked.

After a three-decade increase, the number of twins born around the U.S. is on the decline, according to a new CDC report.

During the early 1980s, the number of twin births saw a 79% growth from 1980 and 2014. Beginning in 2014, the birth rate began to decline,...