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Natl Health Stat Report. 2013 Aug 14;(67):1-18, 1 p following 19.
Infertility and impaired fecundity in the United States, 1982-2010: data from the National Survey of Family Growth.
Chandra A, Copen CE, Stephen EH
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Natl Health Stat Report. 2013 Aug 14;(67):1-18, 1 p following 19.
Chandra A, Copen CE, Stephen EH