Cervicometry

Measuring cervical length to assess preterm birth risk.

Cervicometry is the ultrasound measurement of the length of the cervix that helps assess the risk of preterm birth. The examination is quick, precise and is most often performed using transvaginal ultrasound (as indicated). We provide an expert interpretation of the findings and clear instructions on what to do next.

Page Overview

What is cervicometry in pregnancy and why is it done?

Cervicometry is a simple and safe test in pregnancy that measures the length of the cervix by ultrasound. The aim is to detect in time any shortening of the cervix (or other changes) that may indicate an increased risk of premature birth. If the cervix is shortened, therapy can be introduced in time to reduce the risk of premature birth. If the finding is normal, it gives us additional reassurance and calm during pregnancy. 

The most precise method of measurement: The most reliable method of measurement is transvaginal ultrasound, as it gives a more precise view of the cervix than measurement through the abdomen (abdominal), especially in the early and middle weeks of pregnancy.

Why is this test important?

  • It helps to assess the risk of premature birth and to plan monitoring
  • It enables timely therapy or additional measures (according to findings and the clinical picture)
  • It provides peace of mind and a clear plan when the finding is normal

When is it needed and to whom is it recommended?

Cervicometry is done in pregnancy when there is an increased risk of premature birth and when monitoring of the cervix is needed. It helps us to react in good time and ensure a safe course of pregnancy. It is most often performed between the 18th and 22nd week of pregnancy. However, if there have been previous premature births, it begins at the 14th-16th week of pregnancy. 

It is most often recommended in the following situations:  

  • a previous premature birth or a late miscarriage
  • pregnancy after procedures on the cervix (e.g. conisation)
  • suspicion of a shortened cervix on a previous ultrasound
  • a multiple pregnancy (twins, etc.)

Symptoms and situations when an examination is needed 

  • pressure in the pelvis, pain in the lower abdomen, a change in discharge 
  • a follow-up after therapy or measures introduced because of a shortened cervix
  • bleeding in pregnancy
  • a follow-up after therapy for a shortened cervix
Important: When to contact a doctor immediately? If you have bleeding, fluid leakage, severe pain or regular contractions, this is an emergency; contact the emergency service or maternity ward immediately.

How is cervicometry performed?

A quick, safe and painless ultrasound test in pregnancy. 

1. A brief conversation and medical history

We confirm the weeks of pregnancy, review earlier findings and any symptoms relevant to an accurate assessment.

2. Ultrasound measurement of the cervix

It is most often performed by transvaginal ultrasound, as this allows a more precise measurement of the cervix. 

3. Assessment of the findings

A cervical length of ≥25mm is generally considered a normal finding, while a length of ≤25mm indicates an increased risk depending on the weeks of pregnancy and the clinical picture. 

4. Recommendation and plan

Cervical length may change slightly during pregnancy but as a rule remains stable until the later weeks. Follow-up, further monitoring or therapeutic options are arranged by indication.

Is the examination painful? As a rule no - it may only be mildly uncomfortable, like a standard transvaginal ultrasound. It lasts a few minutes and is performed as part of the standard ultrasound examination.
Approximate values: weeks 16-24 most often 30-50 mm, weeks 24-28 usually 30-45 mm, after week 28 the cervix may gradually shorten as part of the preparation for birth. 

How to prepare for cervicometry?

  • As a rule no special preparation is needed.
  • If a transvaginal measurement is planned, the examination is performed quickly and discreetly.
  • Bring your maternity documentation (findings, discharge letters, previous ultrasound images).

Tell the doctor whether you have any symptoms (pressure, pain, discharge) and when they started.

Quick questions before your visit

  • May I bring old findings?
    Yes - they are useful for comparison and trend monitoring.
  • What if I feel fear or discomfort?
    Feel free to tell us - we will adjust the pace and explain everything in advance.
  • Is cervicometry safe for the fetus?
    Cervicometry is a safe method and does not pose a risk to the fetus.
Note:If you have acute symptoms, contact us straight away - the examination and work-up are planned according to clinical assessment, regardless of the “ideal” timing...

What do you get from this examination?

The aim of cervicometry is not just the result, but also a clear answer and a plan for a calm course of pregnancy. 

1
A clear assessment of the findings
We explain whether the cervical length is normal or requires further monitoring 
2
A recommendation (with a reason)
If additional tests are needed, you receive an explanation of "why" and "when".
3
A care plan
You know when to come for a follow-up, what to look out for and when to seek help sooner if symptoms appear.

In practice this means

  • an explanation of the findings in understandable, “plain language”
  • recommending follow-ups only when they are really needed 
  • arranging a clear timeframe for the next cervicometry (if needed)
  • specific guidance on which symptoms to watch for 
Safe
Clear
Discreet

Why choose Cito Polyclinic?

In pregnancy, clarity, safety and trust are the most important things. That is why we perform cervicometry thoroughly and expertly and give recommendations that you can understand and follow. We ensure: 

  • Enough time for the examination and all your questions
  • Precise measurement and expert interpretation of the findings
  • A discreet and gentle approach
  • The option to arrange check-ups and pregnancy monitoring (if needed)

Want peace of mind and a clear pregnancy monitoring plan?

If you have a high-risk pregnancy, a previous premature birth, a procedure on the cervix or a suspicion of a shortened cervix - together we will determine the optimal monitoring plan. 

Price of cervicometry

The price of cervicometry at Cito Polyclinic is 20€ and includes an ultrasound and consultation with the doctor. Additional tests such as ultrasound, 3D/4D ultrasound, CTG or swabs are charged separately, as needed.

You can get the first available appointment straight away by phone on +385 21 457 800 or by sending a short message via the contact form.

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