Pew Report – Among the Highly Educated, Declines in Childlessness and Increases in Big Families, May 2015 –  “Among women in the United States, postgraduate education and motherhood are increasingly going hand-in-hand. The share of highly educated women who are remaining childless into their mid-40s has fallen significantly over the past two decades. Today, about one-in-five women ages 40 to 44 with a master’s degree or higher (22%) have no children – down from 30% in 1994, according to a Pew Research Center analysis of newly released Census Bureau data. The decline is particularly dramatic among women with an M.D. or Ph.D. – fully 35% were childless in 1994, while today the share stands at 20%. Not only are highly educated women more likely to have children these days, they are also having bigger families than in the past. Among women with at least a master’s degree, six-in-ten have had two or more children, up from 51% in 1994. The share with two children has risen 4 percentage points, while the share with three or more has risen 6 percentage points.”