Obstetric Ultrasonography
First Trimester Obstetric Ultrasound
Indications
Assess gestational age, threatened miscarriage, recurrent miscarriages, pelvic pain or mass, hyperemesis, previous ectopic pregnancy.
Patient Preparation
Patient to present with full bladder at scheduled appointment time. 1 litre of water to be finished 1 hour prior to appointment time.
Second Trimester Obstetric Ultrasound
Indications
Foetal morphology study to be performed between 18-22 weeks
Patient Preparation
Patient to present with an adequately filled bladder. Patient to drink 500mls of water 1 hour prior to appointment time.
Third Trimester Obstetric Ultrasound
Indications
As per individual referrers
Patient Preparation
500mls 1 hour prior to appointment
Any previous imaging for this pregnancy
Nuchal Translucency
A nuchal translucency scan is an ultrasound scan performed in conjuction with a blood test to screen pregnant women for chromosomally abnormal babies.
The test suggests which pregnancies are at higher risk of abnormality and may need further investigation. A normal result does not guarantee a normal baby.
An abnormal result does not mean that the baby is abnormal, but suggests that the baby should be further investigated.
The ultrasound scan for Nuchal Translucency (NT) is performed between 11 weeks 3 days and 13 weeks 6 days of pregnancy. It is painless and carries no risk to the pregnancy.