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Cohort study
Publicly funded postpartum contraception use is associated with a reduction in the rate of subsequent preterm birth
  1. Michael A Krew
  1. Aultman Health Foundation, Canton, Ohio, USA
  1. Correspondence to: Dr Michael A Krew, Aultman Hospital, 2600 Sixth Street SW, Canton, OH 44718, USA; michael.krew{at}

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A short interpregnancy interval (IPI) of 6 months or less is associated with extreme and moderate preterm birth, low birth weight, stillbirth and early neonatal death.1 The availability of contraception to avoid unwanted pregnancies and promote optimal IPI is a proposed strategy to reduce the rate of preterm birth.2 However, other independent maternal risk factors for preterm birth may also be risk factors for short IPI.3


The authors present a retrospective observational study of a cohort of women who delivered in California in 2011, who had at least one …

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  • Competing interests None declared.

  • Provenance and peer review Commissioned; internally peer reviewed.