Explain and consent
Discuss why the scan is recommended and how it will be performed.
Preterm-birth risk assessment
Cervical Length Scan
A focused measurement of the cervix when pregnancy history, symptoms or other findings make preterm-birth risk relevant.
Book a pregnancy scan
Cervical measurementPregnancy historyPreterm riskFollow-up
A precise measurement can shape a time-sensitive care plan.
Transvaginal ultrasound is commonly used because it can provide a reliable cervical measurement. The result is interpreted with gestational age, obstetric history and current symptoms.
From the reason for the visit to the next useful step.
The exact plan may change with clinical findings, pregnancy stage and individual preference.
- 01
Report symptoms first
Pain, pressure, bleeding or fluid leakage may require clinical assessment rather than only a scheduled scan.
- 02
Empty the bladder if instructed
Preparation can differ, so follow the booking instructions.
- 03
Expect privacy
A transvaginal examination requires explanation, consent and an appropriate chaperone policy.
- 04
Know the next date
If monitoring is needed, the clinician should explain the interval and what symptoms require urgent help.
What this examination is designed to review.
Measure consistently
Obtain the cervical length using standard technique.
Review the context
Consider previous preterm birth, pregnancy loss, surgery or current symptoms.
Discuss options
Monitoring, progesterone, cerclage assessment or other care may be discussed depending on the full picture.
Questions about cervical length scan
These answers are general. Individual advice depends on the clinical history and assessment.
Reception can help with appointment details
It can provide a clearer and more reproducible view of the cervix than an abdominal measurement.
No. It indicates increased risk, not certainty. History, gestational age and other findings guide management.
Yes. That is why repeat measurement may be recommended in selected pregnancies.
No. A formal cervical-length assessment uses a specific technique and clinical interpretation.
Seek prompt assessment for regular painful tightening, fluid leakage, bleeding, severe pelvic pressure or rapidly worsening symptoms.