Cervical length
Measure the length of your cervix accurately.
A private cervical length scan from 16 weeks — useful after a previous early birth, cervical treatment or late miscarriage.
A careful measurement.Choose your clinic and view appointment options in our online booking system.
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The cervix stays long and closed during pregnancy. A shorter cervix can be linked to an earlier birth, so measuring it helps your team plan your care.
Measure the length of your cervix accurately.
Look for any opening of the cervix from the inside.
A quick check of your baby’s heartbeat and movement.
Measurements your obstetric team can act on.
A Cervical Scan during pregnancy (also known as a cervix scan ultrasound) is a vital ultrasound procedure designed to monitor the cervix’s length and condition between 16 and 40 weeks gestation.. This scan plays a crucial role in assessing the risk of preterm labor and ensuring the well-being of both mother and baby.
Listen to a Brief Summary
The Cervical Scan focuses specifically on evaluating the cervical canal, which is the lower part of the uterus that opens into the vagina. During this scan, the healthcare provider measures:
This scan is essential for several reasons:
A Cervical Scan is recommended for:

If you are pregnant and have concerns about your cervical health or are considered at risk for preterm labor, a Cervical Scan is an important step in your prenatal care. Book your appointment today with our experienced team to ensure comprehensive monitoring of your pregnancy and peace of mind for your journey ahead.
>>> Check your pregnancy weeks by Pregnancy Calculator
From getting ready to discussing what comes next, here is a simple guide to your appointment.
A question before you book? Call us Not sure how many weeks you are? Use our pregnancy calculatorPrevious births, any cervical treatment, and what your midwife or obstetrician has advised.
A slim probe is placed just inside the vagina for a few minutes to measure the cervix. It is safe in pregnancy. It is painless and takes about 20 minutes.
The sonographer talks you through what they have seen, and your written report follows within 24 hours — ready to share with your GP or specialist.
Choose the location that works for you. Confirm your selected clinic in the booking system before completing your appointment.
Need something more personal?
Speak to the team before booking.
No. A private scan is extra reassurance, not a replacement. Keep all your NHS antenatal appointments and scans, and share our report with your midwife.
Yes. The probe sits in the vagina, well away from the baby, and does not affect the pregnancy.
Yes. Some women are advised to have repeat measurements every few weeks.
Choose the twins or triplets option in the booking form so we reserve the longer appointment each baby needs.
Regular tightenings, pressure low down, bleeding or a gush of fluid need urgent advice. Contact your maternity unit straight away — do not wait for a private scan.
Use the booking form on this page and follow its Next buttons. Choose your scan option and appointment time, enter the requested details, then review the price before completing the booking.
Book your cervical scan below. Follow the booking form’s Next buttons to continue, one step at a time.
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Call the teamBooking this alongside another scan? Each scan keeps its own preparation. If anything is unclear, call us on 020 3318 1373 before your visit.
If you feel unwell, seek medical advice. This page is general information, not a diagnosis. For urgent concerns, contact your GP or NHS 111; in an emergency call 999.
Further reading: NHS guidance on ultrasound scans in pregnancy
Yes, a cervical scan in pregnancy is a safe ultrasound procedure that uses sound waves and does not involve radiation. It can help monitor cervical changes and support early detection of potential risks.
A cervical scan is usually recommended between 16 and 24 weeks of pregnancy to measure the cervix length and assess the risk of preterm birth. However, women with a history of premature delivery, cervical problems, or other pregnancy risk factors may need additional monitoring throughout pregnancy.
Cervical length is most accurately measured using a transvaginal ultrasound scan. During the procedure, a healthcare professional uses a small ultrasound probe to examine the cervix and measure its length safely and accurately.
Please select Appointment type and Branch location to see time slots for booking- alternatively, please contact us via the chat, call or email, 020-3318-1373
Please check what preparation is needed before your ultrasound scan below:
| All Pelvic scans Kidney and Urinary tract Prostate & Urinary Tract Appendicitis Early Pregnancy Scan | Drink One Liter of still water (2 Pints) One hour before your scan. Do NOT use the toilet so you would arrive with a full bladder. Medication can be taken as normal. |
| Liver scans Upper Abdomen Liver Fibroscan (Liver Elastography) | Do NOT eat for 6 hours prior to scan time. |
| Combination of above scans | Same as respective scan’s preparation. |