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The global epidemiology of preterm birth
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Abstract
<p class="first" id="d2273324e115">This article is a part of a series that focuses
on the current state of evidence and
practice related to preterm birth prevention. We provide an overview of current knowledge
(and limitations) on the global epidemiology of preterm birth, particularly around
how preterm birth is defined, measured, and classified, and what is known regarding
its risk factors, causes, and outcomes. Despite the reported associations between
preterm birth and a wide range of socio-demographic, medical, obstetric, fetal, and
environmental factors, approximately two-thirds of preterm births occur without an
evident risk factor. Efforts to standardize definitions and compare preterm birth
rates internationally have yielded important insights into the epidemiology of preterm
birth and how it could be prevented.
</p>