Twin births in the US reach a record high
The U.S. twinning rate hit a record last year, with 33.9 out of every 1,000 births involving twins. Though the increase from the 2013 rate…
The U.S. twinning rate hit a record last year, with 33.9 out of every 1,000 births involving twins. Though the increase from the 2013 rate…