Introduction:

Cervical insufficiency is conceived today as a continuous biological process with progressive degrees of insufficiency. The most extreme expression of cervical insufficiency is known as "hourglass bag". Most authors agree to recommend bed rest and perform emergency cervical cerclage.

Objective:

To report the case of a pregnant woman in whom the prolapse reversal of the amniotic membranes in hourglass was achieved with good perinatal results.

Case report:

A 31-year-old patient who is currently pregnant at 20.6 weeks and has history of childbirth prior to 36.5 weeks. She comes to the consultation complaining of pain in hypogastrium. The physical examination shows that the amniotic sac protrudes through the external cervical orifice and there is 2cm cervical dilation. Drug treatment is applied and the prolapse of the sac is reduced.

Conclusions:

The conservative treatment achieved good evolution of the gestation, with eutócico childbirth and good perinatal results.

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