Comparing cervical cerclage with progesterone to progesterone alone for preventing preterm birth

Cervical Cerclage With Vaginal Progesterone Versus Vaginal Progesterone Only for Preterm Birth Prevention in Women With a Singleton Pregnancy and a Short Cervical Length: a Randomized Clinical Trial

NA · Mỹ Đức Hospital · NCT06463652

This study tests whether combining a cervical stitch with progesterone can help pregnant women with a short cervix prevent preterm birth better than using progesterone alone.

Quick facts

PhaseNA
Study typeInterventional
Enrollment328 (estimated)
Ages18 Years and up
SexFemale
SponsorMỹ Đức Hospital (other)
Locations1 site (Ho Chi Minh City, Ho Chi Minh City)
Trial IDNCT06463652 on ClinicalTrials.gov

What this trial studies

This clinical trial evaluates the effectiveness of combining cervical cerclage with vaginal progesterone versus using vaginal progesterone alone to prevent preterm birth in women with singleton pregnancies and a short cervical length. Participants will be randomly assigned to one of the two treatment groups, with the study conducted in an open-label format across multiple centers. The trial aims to enroll women between 16 to 24 weeks of gestation who have a cervical length of 25 mm or less, ensuring careful monitoring and adherence to local treatment protocols.

Who should consider this trial

Good fit: Ideal candidates are women aged 18 and older with a singleton pregnancy and a cervical length of 25 mm or less.

Not a fit: Patients with cervical dilation, major fetal abnormalities, or other specified complications may not benefit from this study.

Why it matters

Potential benefit: If successful, this approach could significantly reduce the incidence of preterm births in at-risk women.

How similar studies have performed: Previous studies have shown promising results with similar interventions, indicating potential for success in this approach.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Maternal age ≥18 years
* Singleton pregnancy
* Cervical length ≤ 25 mm, measured by TVS at the second-trimester ultrasonography (16 0/7 - 24 0/7 weeks of gestation)
* Not participating in any other study which has intervention on maternity or fetus
* Provision of written informed consent as shown by a signature on the participant consent form.

Exclusion Criteria:

* Cervical dilation with visible amniotic membranes or amniotic membranes prolapsed into the vagina
* Major congenital abnormalities of the fetus
* Intrauterine fetal demise
* Presence of severe vaginal discharge\*
* Presence of vaginitis or cervicitis\*
* Presence of vaginal bleeding\*
* Placenta previa or vasa previa
* Preterm premature rupture of membranes
* Preterm labor without ruptured membrane at the time of screening
* Suspected chorioamnionitis
* Unable to undergo cerclage
* Cerclage in place
* Allergy to progesterone

(\*Women with acute cervicitis, vaginitis or severe vaginal discharge are eligible once they have been treated and if they have a CL ≤25 mm between 16 0/7 - 24 0/7 weeks of gestation.)

Where this trial is running

Ho Chi Minh City, Ho Chi Minh City

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.

View on ClinicalTrials.gov →

Conditions: Preterm Birth, Short Cervix, Cerclage, Progesterone, Singleton, Preterm birth

Last reviewed 2026-05-15 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.