Painless cervical dilation with "hourglass membranes": conservative management

Area of Science:

• Obstetrics and Gynecology
• Maternal-Fetal Medicine
• Reproductive Medicine

Background:

• Cervical competence is now viewed as a continuous process of insufficiency, not simply present or absent.
• Hourglass membranes represent the most severe form of cervical insufficiency.
• No consensus exists for treating amniotic membrane protrusion, though bed rest and emergent cervical cerclage are common.

Purpose of the Study:

• To evaluate the efficacy of conservative management for second-trimester pregnancies with cervical dilation and prolapsed amniotic membranes.
• To present an alternative to surgical emergency cervical cerclage in cases of extreme cervical shortening.

Main Methods:

• A series of clinical cases of second-trimester pregnancies with cervical dilation and prolapsed membranes were managed conservatively.
• Treatment included intravenous fluids, azithromycin, 7-day intravenous antibiotics, vaginal micronized progesterone, and oral indomethacin.

Main Results:

• The mean gestational age at diagnosis was 22.5 weeks.
• Pregnancy was extended by 2.1 to 16 weeks, with 72.72% extending over 8 weeks.
• All cases resulted in live births with favorable outcomes.

Conclusions:

• Conservative management is a viable alternative to emergent cervical cerclage for pregnancies with dilated cervix and protruding membranes.
• While experience is limited, results suggest conservative treatment can lead to successful pregnancy extension and live birth.