Third Trimester Scan

A third trimester scan can happen at any point after 27 weeks. This scan is used to assess the continued development of your baby and to monitor your health as you get closer to the birth.

Many women do not require a scan following their morphology scan. However, some doctors refer for a scan in the later stages of pregnancy to monitor different elements of your pregnancy.

We can determine a lot about your baby in a third trimester scan, including its size and growth, the amount of amniotic fluid present, your baby’s wellbeing, the location of your placenta, and blood flow through the umbilical cord.

During the procedure we scan your pelvis with a full bladder (transabdominal scan).

Image Modality Pregnancy Third


    • Our team will provide specific instructions at the time of booking and these should be followed carefully.
    • Please arrive early for your appointment as you will need to change into a gown. We recommend wearing a separate top and bottoms during your appointment as this makes changing for the examination easier.
    • On arrival, please present to reception. You will be asked to complete a short questionnaire about your medical history.
    • We require you to have a full bladder during this scan. Please drink 500ml of water one hour before your appointment and try your best not to empty your bladder. If you experience difficulty doing this, please talk to us at the time of booking.
    • Please note you are not permitted to take photos or video during the scan. This is a medical procedure and whilst we appreciate you are excited, the health of your baby is our primary concern and we ask for your support and understanding during this clinical appointment.
    • Due to the medical nature of the appointment we ask that you are accompanied by only one other person. If you would like to bring another child, it’s important to be aware that sometimes an internal examination is also required and during this, the child will need to leave the room and be supervised.
  • You will be asked to lie down on a bed and your abdomen will need to be visible. The sonographer will do their best to protect your clothing as they apply a warmed gel to your abdomen.

    This gel helps the sonographer move the probe over your abdomen and towards the pelvic/ovarian area.

    During a third trimester scan the sonographer will observe the development of the baby and will check the function and position of the placenta. They will also look at the specific reason as to why you have been referred for the scan. In some cases, a transvaginal ultrasound is also performed. If you'd like more information about transvaginal ultrasounds you can find this on our website.

    The sonographer and radiologist will work together during an appointment to ensure all the necessary images are captured. This means that sometimes the radiologist will come into the room. If this is the case, you will be consulted before this happens.

  • To ensure we capture all the images the Doctor needs, the Sonographer may take up to an hour to complete the scan.

How much will it cost?

Fees for radiology procedures will vary depending on a variety of factors. We will advise you about the cost of your service at the time of booking but if you do have any questions, contact us and one of our team will be happy to help with your query. You can read more about our billing information here.

How do I access my images?

At Queensland X-Ray, we provide our patients with their images and results online. To access your images and results, you’ll need to register for an account when you visit one of our practices. If you’ve already registered, you can access the Patient Portal here.

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