title: A randomized controlled trial of cervical cerclage in women at high risk of spontaneous preterm delivery. Multicentred controlled trial of cervical cerclage in women at moderate risk of preterm delivery.
mesh_terms: D002584:Cervix Uteri / Q000601:surgery*; D005260:Female; D006801:Humans; D007752:Obstetric Labor, Premature / Q000517:prevention & control*; D011247:Pregnancy; D002581:Uterine Cervical Incompetence / Q000601:surgery*