Interventions during pregnancy to prevent preterm birth: an overview of Cochrane systematic reviews

Background Preterm birth (PTB) is a major factor contributing to global rates of neonatal death and to longer‐term health problems for surviving infants. Both the World Health Organization and the United Nations consider prevention of PTB as central to improving health care for pregnant women and newborn babies. Current preventative clinical strategies show varied efficacy in different populations of pregnant women, frustrating women and health...