Obstetric/Pregnancy Imaging
Dating Scan
An early pregnancy ultrasound will confirm that there is one foetus, that is alive, the correct size, and in the correct position. Gestational Age and due dates may be altered at this time depending on fetal size, and twins may be diagnosed.
Nuchal Translucency (NT) scan
At this gestation, Nuchal Translucency is also assessed which is used to screen for Down syndrome and other chromosome abnormalities in early pregnancy. The scan is usually performed in conjunction with a blood test – either a Non-Invasive Prenatal Test (NIPT) or a Maternal Serum Screening (MSS).
This is performed between 11 weeks and five days, and 13 weeks and six days (Although the ideal time for this ultrasound is closer to 13 weeks).
At this stage, all the major organs and structures have been formed in the foetus, making this a good time for the first detailed assessment of foetal anatomy. Some major structural abnormalities may be detected at this time.
Morphology scan
A 20-22 week morphology scan is a routine examination performed in nearly all pregnancies in Australia. This is predominantly used to assess foetal development (brain, face, spine, heart, lungs, stomach, kidneys, bladder, cord insertion, arms and legs) placental position and amniotic fluid volume. If you don’t wish to know the sex of your baby please tell your sonographer at the start of the examination. Generally, views of the baby are excellent, and this scan is enjoyed enormously by parents.
Third Trimester Scan
Ultrasound scans performed after 26 weeks gestation are primarily to assess foetal growth and wellbeing. Foetal anatomy will be reviewed.