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Fetal Abnormality Screening Test

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first trimester OSCAR scan

What are fetal abnormality screening?

Fetal abnormality screening scans, also known as anomaly scans or second trimester scans, are typically performed between 18 and 22 weeks of pregnancy. They aim to detect any major structural abnormalities or developmental issues in the baby's organs and body systems.  

This is a specialised scan that can only be performed by trained specialists and sonographers using a high resolution ultrasound machine. It is usually performed in an antenatal diagnostic centre. The examination checklist varies between centres and usually takes at least 30 minutes to complete. 

Why do you need fetal abnormality screening?

Fetal abnormality screening scans are recommended for all pregnant women, as they provide valuable information about the baby's growth and development. They help identify potential birth defects or conditions that may require further investigation, monitoring, or treatment.

What do you scan for in fetal abnormality screening?

During fetal abnormality screening scans, your doctor or sonographer would thoroughly examine the baby's organs, including the head/brain, eyes, ears, spine, heart, stomach, spine, kidneys, limbs, and other structures (the detailed checklist may defer between screening centres). They also assess the placenta and the amniotic fluid volume. Any abnormalities or concerns detected during the scan are discussed with the parents, and further diagnostic tests or consultations may be recommended.

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