Detailed Anomaly Scan

Screening for Fetal Chromosomal Abnormalities. Second Trimester Fetal Anomaly Scan.

Scroll down for more details about the Anomaly Scan.


Deborah explains the Detailed Anomaly Pregnancy Scan

More information about the Detailed Anomaly Scan:

This scan is probably the most important diagnostic scan that takes place in a pregnancy. The fetus is the correct size to have all the organs assessed so that the sonographer can see whether your baby has an obvious defect such as spina bifida or a cleft palate.

If you are concerned about chromosomal problems this scan can detect subtle markers that may suggest that your baby is at higher risk for these syndromes. Examples of these markers are thickened skin behind the neck, excess fluid in the kidneys, short arms or legs, bright areas in the heart or abdomen or cysts in the brain.

Remember that most babies are normal and that this scan provides reassurance to the majority of patients. It is also important to note that this is a screening test and that positive or negative findings detected during the scan cannot guarantee either outcome.

The purpose of this scan is:

The purpose of the anatomy scan is to check your baby thoroughly from head to toes. Specific measurements are performed and the visible organs are assessed one by one. The surrounding structures of the pregnancy are also assessed i.e. the cervix, placenta, umbilical cord and amniotic fluid volume.

  • Please note:

    • This scan cannot exclude all abnormalities and syndromes. We are professional sonographers; highly trained and experienced. We follow a strict protocol for this scan, however, some abnormalities cannot be detected.
    • Only 50% of Down Syndrome fetuses can be detected at the detailed anomaly scan.
    • If we discover something that is not in keeping with normal appearances, we will refer you to a fetal medicine specialist for further testing or counselling.

What to expect from a Detailed Anomaly Pregnancy Scan

This scan is performed from on top of you tummy. It usually takes 30-45 mins to perform. You will be able to view your ultrasound on a large television at the bottom of the bed. The sonographer will talk you though the anatomy that she is checking as the scan goes along.

The gender of the baby can also be determined at this stage so feel free to ask the sonographer to disclose this information if you wish to know.