DOI:
10.1055/s-00000169
American Journal of Perinatology Reports
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References
Mathews TJ, Hamilton BE.
First Births to Older Women Continue to Rise. NCHS Data Brief No. 152. Centers for Disease Control and Prevention.
May, 2014. Available at:
http://www.cdc.gov/nchs/data/databriefs/db152.htm . Accessed August 24, 2016
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