| http://www.w3.org/ns/prov#value | - In the United States, infertility is a growing problem: over the last several decades, age-related infertility has become increasingly prevalent as a relatively larger portion of women has deferred childbearing due to effective birth control methods, safe and legal abortions, better access to college education, and greater participation in the labor market (Angrist and Evans 1999; Buckles 2008; Ca
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