Understanding the Detailed Anomaly Scan at 20 Weeks
The detailed anomaly scan — also known as a level 2 or morphology scan — is one of the most important ultrasound examinations during pregnancy. It is typically performed between 18 and 22 weeks of gestation and provides a comprehensive assessment of the baby's anatomy.
During the scan, the specialist systematically examines the baby's brain and skull, face (including lips and palate), spine, heart (all four chambers and major vessels), lungs, stomach, kidneys, bladder, limbs, and the umbilical cord and placenta. The scan also assesses the amount of amniotic fluid and the baby's overall growth.
The anomaly scan is not just about detecting abnormalities — it is also a reassurance tool. The vast majority of scans show a normally developing baby, which gives parents confidence and peace of mind. When something unusual is found, early detection allows for better planning, counselling, and in some cases, early intervention.
The quality and accuracy of the anomaly scan depend heavily on the skill and experience of the person performing it. Dr. Kartik performs detailed anomaly scans himself, bringing his MFM training and years of experience in fetal imaging to every scan. This matters because subtle findings — such as minor heart defects or soft markers — require expert interpretation.
If the scan identifies any concerns, Dr. Kartik will explain the findings clearly, discuss what they mean, outline any recommended next steps (which may include follow-up scans, additional tests, or specialist referrals), and provide honest, compassionate guidance throughout.
Further reading
- Antenatal Care: 20-Week Screening Scan — NHS (UK)
- ISUOG Practice Guidelines: Performance of the Routine Mid-Trimester Fetal Ultrasound Scan — International Society of Ultrasound in Obstetrics and Gynecology
Frequently Asked Questions
Is the anomaly scan painful?
No. It is a standard ultrasound scan performed on the abdomen. It is painless and safe for both mother and baby.
What if something abnormal is found?
Dr. Kartik will explain the finding clearly, discuss its significance, and outline the recommended next steps. Not all findings are serious — some are minor variations that resolve on their own.
Can I find out the baby's gender during this scan?
Yes, the baby's gender can usually be determined during the anomaly scan if the parents wish to know.
Have Questions About Your Pregnancy?
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