Vidaeff, Alex C From concept to practice: the recent history of preterm delivery prevention. Part I: cervical competence. [electronic resource] - American journal of perinatology Jan 2006 - 3-13 p. digital Publication Type: Journal Article; Review ISSN: 0735-1631 Standard No.: 10.1055/s-2005-923437 doi Subjects--Topical Terms: Cerclage, CervicalCervical RipeningCervix Uteri--diagnostic imagingFemaleHumansPregnancyPremature Birth--physiopathologyUltrasonography, PrenatalUterine Cervical Incompetence--physiopathology