title: Spontaneous preterm labor and cervical length.
authors: G
authors: G
authors: Mohammed
mesh_terms: D002584:Cervix Uteri / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D007752:Obstetric Labor, Premature / Q000000981:diagnostic imaging / Q000209:etiology*; D010298:Parity / Q000502:physiology; D011247:Pregnancy; D014463:Ultrasonography