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Reports conflict over the value of prophylactic, therapeutic, or rescue cervical cerclage for women at risk of preterm labour because of cervical incompetence.
A Cochrane Collaboration review completed in 2002 identified six relevant trials, four of which studied the effect of cerclage versus no cerclage in preventing preterm delivery.
Those with a history of multiple gestations, ruptured membranes, history of cervical cerclage , signs of preterm labor or serious medical problems were excluded.
Cervical change noted before fetal viability is a better indication for cerclage than if it is identified after fetal viability has been achieved.
No randomized studies have shown that use of tocolytic therapy after cerclage is effective.
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