Preterm delivery before 34 weeks affects 1 every 100 babies.
Very premature birth is not common but can sometimes cause life-long disability. Measuring the length of the neck of the womb (cervical length) can give an indication of whether the baby is likely to be born premature. However it is not possible to determine for certain the exact date of birth.
How is the cervical length scan done?
This is an internal (vaginal) scan performed at 17-24 weeks. It is not painful and it is safe for the pregnancy.
An external (abdominal) scan will also be performed to assess the growth and well-being of the baby during the same visit. You will get a report immediately after the scan and you will have the opportunity to ask any questions.