Quoted: One major factor is that fewer teens are having babies. Teen births have dropped 60 percent over a decade, said David Egan-Robertson, of the UW-Madison Applied Population Laboratory.
“And in 2017, for the first time, teen births fell below 4 percent of total births,” he said. “So that’s quite a significant change. It’s been a very long-term process, but that’s a noticeable change in that age group.