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How does 3D ultrasound work?

How 3D ultrasound works

This medical ultrasound technique provides a 3-dimensional image of your fetus

At OMNI Ultrasound & Gynaecology Care in Sydney we offer patients ultrasound scans to evaluate their unborn fetus. This technology allows expectant parents and clinicians real-time view of the fetus during the antenatal period.

The importance of clinical antenatal assessment

Antenatal care is important in helping to obtain the best possible outcome for the mother and child. Traditionally, antenatal care involves a number of routine visits on a regular basis to ensure the health of you and your unborn child.

At OMNI Ultrasound & Gynaecology Care we see pregnant women at:

  • Dating the pregnancy and checking pregnancy viability

This early pregnancy scan is a routine viability/dating scan. This scan is useful for excluding ectopic pregnancy as well as aids in the timing of the 12 week Nuchal Translucency (NT) scan.

  • 10-14 weeks

To assess 2 maternal pregnancy hormones: PAPP-A and free hCG. These are used to measure the chance of your baby having Down’s Syndrome.

  • 11-14 weeks

Routine scanning for Downs Syndrome (NT scan) +/- Consultation and complimentary 3D/4D images on a USB (as long as the baby is in the right position).

  • 12-18 weeks

This is when you can undergo Invasive testing such as (CVS or amniocentesis) in case of high risk NT scan results. With invasive tests there is a small risk of miscarriage: approximately 0.5-1%.

OMNI does offer a non-invasive blood test (NIPT) to ascertain the likelihood of your baby having chromosomal problems.

  • 18-20 weeks

Morphology scan is a detailed ultrasound which examines the brain, face, heart, spine, chest, abdomen, stomach, kidneys, bladder, arms, hands, legs and feet.  If you wish we can also tell you the gender of your baby.

You will receive complimentary 3D/4D images on a USB (as long as the baby is in the right position).

  • 22-42 weeks

Fetal growth and wellbeing scan assesses the growth and wellbeing of your baby.  This scan is a 3D/4D scan that locates the placenta, measures your baby’s head, abdomen and thigh bone as well as observing your body’s activity.

You will receive complimentary 3D/4D images on a USB (as long as the baby is in the right position).

What is 3D ultrasound?

With 3D fetal scanning the soundwaves from the ultrasound are sent at multiple angles instead of straight down. The returning echoes are processed via a 3D ultrasound transducer resulting in reconstructed 3D volume image of your fetus’s surface or internal organs.

Unlike 2D ultrasounds, 3D allows you to see width, height and depth much like 3D movies. The main difference being no movement is shown. 3D ultrasound scan is done through your tummy and involves no risk to your or your baby.

Although the imagery generated by 3D technology at OMNI gives the expecting parents great views of their baby, there is no evidence that this technology adds to the standard 2D ultrasound when assessing your fetus’ anatomy.

OMNI Gynaecology & Ultrasound have an App

Our App allows you to calculate the best time for you to have your scans, as well as interact with the 3D/4D unborn baby throughout your pregnancy.  It has a database of baby names and the definitions of names as well as information of the 2D, 3D and 4D scans that OMNI provides patients. You can download the App here.

To find out more about how OMNI Ultrasound & Gynaecology Care in Sydney can help you, or to book a consultation, please contact us today.

Book an appointment

Call Omni today on 1300 851 968

Three convenient locations

St Leonards Clinic

1300 851 968


1300 851 971


Ground Floor
Suite 2/8 Northcote St
St Leonards NSW 2065

Penrith Clinic

1300 851 968


1300 851 971


Level 2, Suite 2.01
Somerset Hospital, 38 Somerset Street
Kingswood NSW 2747


1300 851 968


1300 851 971


Suite 1005, Level 10
229 Macquarie St
Sydney NSW 2000

OMNI Ultrasound & Gynaecological Care