title: Why should preterm births be rising?
authors.forename: A H
authors.initials: AH
authors.lastname: Shennan
authors.forename: S
authors.initials: S
authors.lastname: Bewley
mesh_terms: D005260:Female; D006801:Humans; D015994:Incidence; D011247:Pregnancy; D011256:Pregnancy Outcome; D047928:Premature Birth / Q000453:epidemiology* / Q000209:etiology / Q000517:prevention & control