Procedures & Gynaecology
Detailed Anomaly Scans
A comprehensive ultrasound examination at 18–22 weeks to check the baby's structural development in detail.
What is Detailed Anomaly Scans?
The detailed anomaly scan (also called the mid-trimester morphology scan) is a thorough ultrasound examination typically performed between 18 and 22 weeks of pregnancy. It systematically examines the baby's brain, face, spine, heart, lungs, abdomen, kidneys, limbs, and placenta. It also assesses amniotic fluid volume and the position of the placenta relative to the cervix.
Why is it a Concern?
The anomaly scan is one of the most important screening tools in pregnancy. It can detect structural anomalies that may require further investigation, specialist referral, or planned delivery at a facility with neonatal surgical capabilities. Early detection allows families and medical teams to prepare.
Signs & Symptoms
- This is a routine screening scan — offered to all pregnant women
- No specific symptoms are required
- Women with risk factors may benefit from a specialist-performed scan
How It is Monitored
The scan takes approximately 30–45 minutes and examines all major organ systems. If any abnormality is suspected, follow-up specialist scans, fetal echocardiography, or genetic testing may be recommended. A normal anomaly scan is reassuring but does not guarantee the absence of all conditions.
Why See an MFM Specialist?
When performed by an MFM specialist, the anomaly scan benefits from advanced training in fetal anatomy, the ability to detect subtle findings that may be missed on routine scanning, and immediate access to counselling and further investigation if an anomaly is identified.
Dr. Kartik Balaraman Manages This Condition
Dr. Kartik performs detailed anomaly scans personally, ensuring thorough examination and immediate expert interpretation. Book your anomaly scan with Dr. Kartik.
Book ConsultationFrequently Asked Questions
When is the best time for the anomaly scan?
The optimal window is between 18 and 22 weeks of pregnancy. At this stage, the baby is large enough for detailed examination but there is still time for further investigation if needed.
What if something is found on the scan?
If an anomaly is suspected, Dr. Kartik will explain the finding, its significance, and recommend next steps — which may include further imaging, genetic testing, or specialist referrals.
Can the scan tell the baby's gender?
Yes, the baby's gender can usually be determined at the anomaly scan, though this is not the primary purpose of the examination.
How long does a detailed anomaly scan take?
Typically 30 to 45 minutes, depending on the baby's position and how easily each structure can be visualised. Occasionally a follow-up scan is needed if views are limited.
Is the anomaly scan the same as a 4D scan?
No. The anomaly scan is a clinical examination in 2D focused on fetal anatomy. 4D scans produce moving video-like images and are primarily for parental bonding, not medical assessment.
Related Conditions
Fetal Structural Anomalies
When a detailed scan identifies a structural difference in the baby's development.
Fetal Echocardiography
A specialised ultrasound examination focused on the baby's heart structure and function.
Chromosomal & Genetic Screening
Screening and diagnostic tests to assess the risk of chromosomal conditions such as Down syndrome.
Reviewed by Dr. Kartik Balaraman, Consultant OBGYN & Maternal Fetal Medicine Sub-Specialist ·
This page is for general education and does not replace personalised medical advice. If you have concerns about your pregnancy or health, consult a qualified specialist directly.