title: Cervical length changes from the first to second trimester of pregnancy, and prediction of preterm birth by first-trimester sonographic cervical measurement.
authors: Joseph R
authors: JR
authors: Wax
authors: Michael G
authors: MG
authors: Pinette
mesh_terms: D002584:Cervix Uteri / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011262:Pregnancy Trimester, Second; D047928:Premature Birth / Q000473:pathology*; D016216:Ultrasonography, Prenatal / Q000379:methods*