Uno de cada 30 partos en EE.UU. son gemelos
One out of every 30 babies born in the United States will be born a twin according to new statistics reported this week that show the number nearly doubling in the last 20 years.
With more women using fertility treatments and giving birth at older ages, the likelihood for twins, triplets and other multiples have drastically increased, according to researchers from Michigan State University and the Centers for Disease Control and Prevention.
Their report found that in 2009, a pair of twins were born for every 30 babies compared to 1980's findings of one pair out of every 53.
