Cervical Scan
A cervical scan is a transvaginal ultrasound used to measure the length of your cervix during pregnancy. It helps assess the risk of preterm birth and is particularly important for women who have a history of early delivery, cervical surgery, abnormalities of the uterus (bicornuate, didelphis, septate…), prior caesarean section at full dilatation or are expecting twins or more.
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Why is a cervical scan important?
The cervix plays a key role in maintaining a pregnancy. If it shortens or opens too early, there’s a higher chance of premature labour.
This scan is recommended if you:
- Have had a previous preterm birth (especially if prior to 34 weeks gestation)
- Have had cervical surgery (e.g. LLETZ or cone biopsy)
- Are carrying twins or more
- Have a known uterine abnormality (bicornuate, didelphis, septate…)
- Have experienced second trimester losses
- Have had a prior caesarean section performed at full cervical dilatation
By checking the length of the cervix early, we can identify problems before they become serious and offer treatments to reduce the risk of premature birth.
When is a cervical scan performed?
- Typically performed between 16 and 24 weeks
- In high-risk cases, a series of scans may be recommended, starting from 16 weeks and repeated every 2–3 weeks depending on findings
How is the cervical scan performed?
- The scan is done transvaginally (via the vagina) for the most accurate measurement
- It takes just a few minutes and is not painful
- A slim ultrasound probe is gently inserted to visualise the cervix in detail
- You’ll be asked to empty your bladder beforehand for comfort and best results
What do the results mean?
- A normal cervical length is 25mm or more
- If the cervix measures less than 25mm, you may be offered:
- Progesterone therapy (vaginal pessaries)
- A cervical stitch/suture (cerclage)
- More frequent monitoring
All results are explained clearly during your appointment, and next steps will be discussed based on your personal pregnancy history and findings.
What should I expect after the scan?
- Duration: The scan itself takes 5 minutes, but the appointment usually lasts around 30 minutes to allow time for discussion
- Results: You’ll receive a printed scan report and images on the day. We will also email your report to your referring doctor, if provided
- Images: If you desire a printed 2D image of the cervical length, photos will be given to you with no extra charge.
- Second opinion: If you are seeking a second opinion, please bring or send your previous reports in advance
What is the price for the Cervical scan?
Please refer to our Fees & Services page for current pricing, or contact our team directly for more information.
