File:USA percentage low birthweight by maternal age.jpg: Revision history

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18 April 2018

10 April 2010

9 April 2010

  • curprev 18:0118:01, 9 April 2010S8600021 talk contribs 2,035 bytes +2,035 Percentage low birthweight by age of mother: United States: 1990 and 2006 Over the past several decades, national LBW levels have been strongly influenced by the large growth in the rate of multiple births, more than one-half of which are delivered at le