UNDP/UNFPA/UNICEF/WHO/World Bank Special Programme of Research, Development and Research Training in Human Reproduction (HRP), Department of Reproductive Health and Research, World Health Organization, Geneva, Switzerland.
Maternal Fetal Medicine Unit, Department of Obstetrics and Gynaecology, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand.
Best Pract Res Clin Obstet Gynaecol. 2018 Oct;52:3-12. doi: 10.1016/j.bpobgyn.2018.04.003. Epub 2018 Apr 26.
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.
本文是一系列专注于早产预防的现有证据和实践的文章之一。我们提供了当前关于早产全球流行病学的知识（和局限性）概述，特别是围绕早产的定义、测量和分类，以及关于其危险因素、原因和结果的了解。尽管早产与广泛的社会人口、医疗、产科、胎儿和环境因素有关，但大约三分之二的早产没有明显的危险因素。为了标准化定义并在国际上比较早产率，人们对早产的流行病学以及如何预防早产有了重要的认识。
