title: Preterm birth and previous conisation of the cervix.
authors.forename: P N
authors.initials: PN
authors.lastname: Bamford
authors.forename: S A
authors.initials: SA
authors.lastname: Hall
mesh_terms: D002584:Cervix Uteri / Q000601:surgery*; D019092:Conization / Q000009:adverse effects*; D005260:Female; D006801:Humans; D007752:Obstetric Labor, Premature / Q000209:etiology*; D011247:Pregnancy