Today's American dad is slightly older -- roughly 3½ years -- than his counterpart from four decades ago, according to a study published Thursday in the journal Human Reproduction. The average age of a father of a newborn in the United States increased from 27.4 years old to 30.9 years old between 1972 and 2015, found Stanford University School of Medicine researchers led by Dr. Michael Eisenberg.
원문출처 : http://www.cnn.com/2017/08/30/health/older-dads-us-study/index.html
원문출처 : http://www.cnn.com/2017/08/30/health/older-dads-us-study/index.html