| http://www.w3.org/ns/prov#value | - However, data from the 2002 and 2006--2008 NSFGs suggest that no additional improvements have occurred: contraceptive use among women at risk for unintended pregnancy has decreased; only small gains have been made in the use of the most effective forms of reversible contraception, such as intrauterine devices and hormonal implants (90); and no additional progress has been made toward reducing unin
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