Why Every Pregnant Woman Should Get an Anomaly Scan
The anomaly scan between 18 and 22 weeks is the most detailed look your doctor can take at your growing baby — and it belongs in every pregnancy, not just high-risk ones.
What Exactly is the Anomaly Scan?
The anomaly scan — known by several names including the Level 2 ultrasound, morphology scan, mid-pregnancy scan, and most commonly in India, the TIFFA scan (Targeted Imaging for Fetal Anomalies) — is a detailed ultrasound examination of the baby performed between 18 and 22 weeks of pregnancy.
Unlike earlier pregnancy scans which primarily confirm the baby's heartbeat, estimate gestational age, and screen for chromosomal markers, the anomaly scan is a systematic, structure-by-structure examination of the baby's developing anatomy. The sonographer methodically checks each organ and body region — the brain, face, heart, spine, abdominal organs, limbs, and more — assessing whether each is forming as expected for this stage of pregnancy.
The scan also evaluates the baby's immediate environment: the location and health of the placenta, the volume of amniotic fluid, and the structure of the umbilical cord. Fetal measurements are taken to confirm that growth is tracking appropriately for the gestational age.
Where the Anomaly Scan Fits in Your Pregnancy
What Does the Anomaly Scan Check?
The scan works through a systematic checklist of structures. Here is what the sonographer examines:
Brain & Head
Skull shape, brain ventricles, cerebellum, corpus callosum, neural tube closure.
Face & Lips
Profile, both eyes, nasal bone, lips and palate to screen for cleft lip.
Heart
4-chamber view, outflow tracts, rhythm — major cardiac defect screening.
Spine
Full spine survey — screens for spina bifida and neural tube defects.
Chest & Diaphragm
Lungs, diaphragm integrity. Rules out diaphragmatic hernia.
Abdominal Wall
Confirms closure. Rules out gastroschisis or omphalocele.
Stomach & Bowel
Stomach bubble confirms swallowing. Bowel appearance assessed.
Kidneys & Bladder
Both kidneys confirmed, bladder visible. Checks for hydronephrosis.
Limbs & Hands
All four limbs, long bone measurements, hands and feet examined.
Umbilical Cord
Cord insertion confirmed. Number of vessels assessed.
Placenta
Location documented. Detects placenta praevia.
Amniotic Fluid
Volume assessed. Too little or too much can indicate problems.
Why Every Pregnant Woman Needs This Scan — Not Just High-Risk Pregnancies
The most common reason women give for skipping the anomaly scan is this: "My pregnancy is going well. My doctor said I am low-risk. I don't think I need it."
This reasoning, while understandable, rests on a fundamental misunderstanding of what "low-risk" actually means in medicine — and why the anomaly scan exists precisely for low-risk pregnancies.
The term "low risk" means that based on measurable factors — the mother's age, medical history, family history, and early scan results — the statistical probability of a complication is lower than average. It does not mean the probability is zero. And crucially, the majority of babies born with significant structural anomalies are born to women who were classified as low risk with no identifiable risk factors. The anomaly scan exists to find the cases that risk stratification cannot predict.
8 Reasons Why the Anomaly Scan is Essential for Every Pregnancy
Most Structural Anomalies Occur in Low-Risk Pregnancies
This is the single most important fact that every expecting mother needs to know. Structural birth defects — heart defects, neural tube defects, kidney abnormalities, cleft lip, abdominal wall defects — do not confine themselves to pregnancies with risk factors. They occur across the entire population. Studies consistently show that the majority of babies born with major structural anomalies were in pregnancies where no risk factor had been identified. Risk stratification is useful but imperfect — it tells you the odds, but not what is actually happening inside a specific pregnancy. The anomaly scan tells you that directly.
Risk Stratification · Population-Wide Detection · Evidence-BasedEarly Detection Creates Options That Later Detection Cannot
When a significant finding is identified at 20 weeks, the parents and medical team have approximately 20 weeks before birth to respond. This time can be used to arrange specialist consultations, plan the birth at a centre with appropriate neonatal facilities, prepare for immediate neonatal surgery if required, arrange counselling and emotional preparation, conduct further investigations to clarify the diagnosis, or in some cases, explore intrauterine interventions. When the same finding is discovered at birth or after birth — because no anomaly scan was performed — none of this preparation is possible. The medical team responds reactively rather than proactively. The outcomes, for both the baby and the family, are consistently better when advance warning was available.
Early Detection · Specialist Planning · Better OutcomesIt Is the Only Comprehensive Structural Survey Available During Pregnancy
No other investigation during pregnancy examines the baby's anatomy with the breadth and detail that the anomaly scan provides. The NT scan checks chromosomal markers and the nuchal fold — it does not assess the heart in detail, or the spine, or the kidneys, or the abdominal wall. The growth scan in the third trimester monitors fetal size and blood flow — it does not re-examine anatomy with the same systematic detail. The anomaly scan at 18–22 weeks is the only dedicated, whole-body anatomical survey available during a pregnancy — and it occurs at exactly the right developmental stage to assess all major structures simultaneously. Missing this window means there is no equivalent opportunity to replace it.
Comprehensive Survey · 18–22 Week Window · UnreplaceableIt Detects Conditions Where Survival Depends on Delivery Planning
Certain structural conditions — complex congenital heart defects, gastroschisis, diaphragmatic hernia, bladder outlet obstruction — require the baby to be delivered at a centre equipped with specific neonatal surgical or cardiac facilities. If a baby with one of these conditions is born at a local hospital without these capabilities, the time lost in emergency transfer can directly affect survival and long-term outcomes. When the anomaly scan identifies such a condition in advance, the birth can be planned at an appropriate centre from the outset — with the surgical team ready, the neonatal intensive care unit prepared, and a plan in place from the moment of delivery. This is not a theoretical benefit. It is a practical, documented difference in outcomes that early detection enables.
Delivery Planning · Neonatal Readiness · Survival OutcomesIt Provides Reassurance for the Vast Majority of Women
More than 95% of anomaly scans return completely normal results. For these women and their families, the scan is not a source of worry — it is the most reassuring appointment of the pregnancy. Seeing a healthy brain, a beating four-chambered heart, a complete spine, normally formed kidneys, all four limbs measuring appropriately — this is not just data. For many parents, it is the moment anxiety transforms into confidence. The scan gives them an informed foundation for the rest of the pregnancy — not a vague hope that everything is probably fine, but actual visual evidence that it is. This reassurance alone is a compelling reason to attend.
Reassurance · 95%+ Normal Results · Parental ConfidenceIt Detects Placental and Fluid Problems That Affect the Mother, Not Just the Baby
The anomaly scan is not only an assessment of the baby. It also evaluates the placenta and amniotic fluid — two components that have significant implications for the mother's health and delivery. Placenta praevia — a condition where the placenta lies low in the uterus, partially or completely covering the cervix — can cause life-threatening bleeding during labour if it goes undetected. The anomaly scan identifies placenta praevia early, allowing the medical team to plan a safe caesarean birth and advise the mother on activity restrictions in the interim. Similarly, abnormal amniotic fluid volume (too little or too much) signals conditions that require monitoring and management before they escalate.
Placenta Praevia Detection · Fluid Assessment · Maternal SafetyIt Is Completely Safe — and Has Been for Over 60 Years
One of the reasons some women hesitate about scans during pregnancy is a general anxiety about whether any medical procedure could harm the baby. In the case of the anomaly scan, this concern, while understandable, is not supported by the evidence. The anomaly scan uses diagnostic ultrasound — high-frequency sound waves, with no ionizing radiation of any kind. Ultrasound has been used in obstetric practice globally for over 60 years, with an outstanding safety record and no documented harm to mother or baby from a routine diagnostic scan performed by trained professionals. The anomaly scan is not just safe — it is one of the safest interventions available during pregnancy, with benefits that far exceed any theoretical concern.
Zero Radiation · 60+ Years Safety Record · WHO RecommendedIt Gives Parents the Information They Deserve to Have
Beyond the clinical rationale, there is a more fundamental reason why every pregnant woman should have an anomaly scan: it is the most complete picture of your baby's health available during pregnancy, and you deserve to have it. Whether the result is entirely normal — as it is for the vast majority of women — or reveals something that needs attention, the information belongs to you. Pregnancy brings enough uncertainty as it is. The anomaly scan replaces one large unknown with certainty about your baby's developing anatomy. That certainty — whether reassuring or challenging — is information every expecting parent has the right to access, so that whatever lies ahead can be faced with knowledge rather than assumption.
Informed Parenthood · Patient Rights · Knowledge-Based CareCommon Misconceptions — Addressed Honestly
Despite its importance, several misconceptions lead women to delay or skip the anomaly scan. Here is what the evidence actually shows:
| Common Misconception | What Is Actually True |
|---|---|
| "I am young and healthy — I don't need an anomaly scan." | Age and health status do not predict structural anomalies. Most heart defects, neural tube defects, and abdominal wall defects occur in pregnancies with no identifiable risk factors in mothers of all ages. |
| "My NT scan was normal — the anomaly scan is redundant." | The NT scan screens for chromosomal markers — it does not assess cardiac structure in detail, the spine, kidneys, abdominal wall, or limbs. A normal NT scan does not predict a normal anomaly scan and cannot replace it. |
| "If there were a problem, my doctor would already know." | Many structural anomalies produce no symptoms, no abnormal blood tests, and no clinical signs before the anomaly scan. The scan is specifically designed to find what clinical assessment alone cannot detect. |
| "I had a healthy first child — this pregnancy will be fine too." | Most structural anomalies are not inherited and do not repeat based on previous pregnancy outcomes. Each pregnancy is independently assessed. |
| "Finding something will just cause unnecessary stress." | The anomaly scan identifies a concern in fewer than 5% of pregnancies. For the 95%+ with normal results, the scan provides reassurance, not stress. For the small percentage where something is found, early knowledge — while emotionally challenging — consistently produces better outcomes than late or no detection. |
| "The scan uses radiation — it could harm the baby." | Ultrasound uses sound waves, not radiation. It is not an X-ray or CT scan. There is no ionizing radiation involved and no documented harm from routine diagnostic ultrasound in over 60 years of obstetric practice. |
| "I will do it later — there is no rush." | The anomaly scan must be done between 18 and 22 weeks. Beyond 22 weeks, the baby is larger and harder to examine completely. Waiting too long means the scan window closes. |
If the Scan Finds Something — What Happens Next
The possibility of an unexpected finding is the source of most anxiety about the anomaly scan. It is worth addressing this honestly and compassionately.
For the Vast Majority — A Normal Result
- More than 95% of anomaly scans return completely normal results — all organs present, normally formed, growing appropriately.
- This outcome gives parents genuine, evidence-based reassurance — not an assumption, but actual visual confirmation of healthy development.
- You leave with a set of ultrasound images and a written radiologist's report confirming normal fetal anatomy.
For a Small Number — A Finding Requiring Follow-Up
- Minor or uncertain findings (soft markers) — some measurements are slightly outside the expected range but are often self-resolving. A repeat scan in 3 to 4 weeks usually clarifies these findings.
- Structural finding needing further evaluation — a repeat scan, fetal echocardiogram, referral to a fetal medicine specialist, or additional chromosomal testing may be recommended.
- Significant finding — if a serious structural anomaly is identified, you will be referred to a fetal medicine or maternal-fetal medicine specialist. A team of experts will discuss options, further investigations, and the best plan for your pregnancy and birth.
- At every stage, you receive the information and the support to make informed decisions — and the time to do so.
Finding a concern early is never the worst outcome. It is the beginning of informed care. The families who face the greatest difficulty are those who discover significant findings at birth or after — without the preparation time that a normal anomaly scan appointment would have provided.
How to Prepare for Your Anomaly Scan
Before Your Appointment
- Drink water — 2 to 3 glasses about 30 to 45 minutes before the scan. A comfortably full bladder helps improve image quality for the transabdominal approach.
- No fasting required — you can eat and drink normally before your appointment.
- Wear comfortable clothing — loose, two-piece clothing that allows easy access to the abdomen makes the examination more comfortable for you.
- Bring previous reports — your NT scan report, any earlier pregnancy scan reports, and your gynaecologist's referral letter if you have one.
- Timing matters — schedule your scan between 18 and 22 weeks. Do not delay beyond this window, as image quality and accessibility of certain structures diminishes after 22 weeks.
- Allow 45 to 60 minutes — the scan itself takes 30 to 45 minutes, but allow extra time for registration and waiting for your written report.
Book Your Anomaly Scan at Usmanpura Imaging Centre, Ahmedabad
For over 40 years, Usmanpura Imaging Centre has supported the pregnancy journeys of families across Ahmedabad and Gujarat — providing accurate, compassionate, and timely obstetric imaging at every stage of antenatal care.
Our anomaly scan service is conducted by experienced sonographers using advanced ultrasound equipment, in private, comfortable scan rooms. Every report is prepared by a qualified radiologist and delivered the same day. We understand that the anomaly scan appointment carries both excitement and anxiety — and we ensure every patient receives a thorough, professional, and supportive experience.
Pregnancy Scan Services at Usmanpura Imaging Centre
- Anomaly Scan (TIFFA / Level 2) — Detailed fetal anatomy survey at 18–22 weeks
- NT Scan (Nuchal Translucency) — First trimester chromosomal screening at 11–14 weeks
- Dating & Viability Scan — Early pregnancy confirmation and gestational age dating
- Growth Scan (Third Trimester) — Fetal growth, fluid, and position monitoring
- Colour Doppler (Obstetric) — Umbilical and uterine artery blood flow assessment
- Fetal Echo (Basic) — Cardiac four-chamber and outflow tract assessment
- 3D / 4D Sonography — Three-dimensional fetal imaging
- Cervical Length Scan — Preterm birth risk assessment
- Biophysical Profile (BPP) — Fetal wellbeing scoring in late pregnancy
Anomaly Scans Available Across Ahmedabad & Gujarat
Book Your Anomaly Scan Today
Walk-ins welcome · Same-day reports · 24-hour service · Experienced sonographers · Private, comfortable scan rooms · Serving all of Ahmedabad, Gandhinagar & Gujarat.
Frequently Asked Questions
Common questions from expecting parents about the anomaly scan in Ahmedabad:
The anomaly scan is the most detailed ultrasound of pregnancy. It checks the baby's brain, heart, spine, organs, limbs, and placenta between 18–22 weeks. It identifies structural abnormalities at the stage when there is still time to plan specialist care, prepare for a different birth setting, arrange immediate neonatal intervention, or conduct further diagnostic testing. It is the single most informative scan of pregnancy and is recommended for every pregnant woman regardless of risk level.
No. The vast majority of babies born with significant structural abnormalities are born to mothers with no known risk factors and no family history of birth defects. A "low-risk" classification does not mean a specific baby has no anomaly — it means the statistical probability is lower than average. The anomaly scan is the only way to assess the baby's anatomy directly. Skipping it means missing the best available opportunity to detect conditions that early knowledge can significantly help manage.
The anomaly scan should be performed between 18 and 22 weeks of pregnancy, with 20 weeks being the most common timing. At this stage the baby's organs are sufficiently developed for detailed assessment, and if any concern is identified, there is still time to arrange further evaluation or specialist care before birth. Do not delay beyond 22 weeks — the window for a complete anatomical survey closes after this point.
The anomaly scan checks the baby's brain, face and lips, spine, heart (4-chamber view and outflow tracts), lungs, diaphragm, abdominal wall, stomach, kidneys, bladder, all four limbs, hands, feet, and umbilical cord. It also assesses the placenta location, amniotic fluid volume, and confirms that fetal measurements are appropriate for gestational age.
Yes. The anomaly scan uses diagnostic ultrasound — high-frequency sound waves — with no ionizing radiation. Ultrasound has been used in obstetric practice globally for over 60 years with an outstanding safety record. There is no documented harm to mother or baby from a routine diagnostic ultrasound performed by a trained professional at the power levels used in clinical practice.
If a concern is identified, the radiologist or sonographer will discuss it calmly and clearly. Depending on the finding, next steps may include a repeat scan in 3 to 4 weeks, a dedicated fetal echocardiogram, referral to a fetal medicine specialist, or chromosomal testing. Many findings are minor or self-resolving. Early identification always gives parents and the medical team the best opportunity to plan the most appropriate care and delivery setting.
The anomaly scan is not legally mandated but is universally recommended as part of standard antenatal care in India by FOGSI (Federation of Obstetric and Gynaecological Societies of India), the Indian Academy of Pediatrics, and the Indian Radiological & Imaging Association. Every gynaecologist in India routinely recommends the TIFFA / Level 2 scan between 18 and 22 weeks of pregnancy.
Drink 2 to 3 glasses of water about 30 to 45 minutes before your appointment and do not urinate beforehand — a comfortably full bladder improves image quality. No fasting is required. Wear loose, comfortable two-piece clothing. Bring your previous scan reports, antenatal booklet, and your gynaecologist's referral if you have one. Allow approximately 45 to 60 minutes for the full appointment.
Usmanpura Imaging Centre offers anomaly scans across 9+ branches in Ahmedabad — Usmanpura, Maninagar, Bapunagar, Naroda, Nikol, Satellite, Sabarmati, Vadaj, and Juhapura — as well as Gandhinagar, Bareja, Rajkot, Morbi, Anand, Nadiad, Patan, and Himatnagar. All centres are open 24 hours, 7 days a week. Call +91 79 6969 0900 or WhatsApp +91 97255 04245 to book.
The NT scan is done at 11–14 weeks to screen for chromosomal markers (such as Down syndrome) by measuring fluid at the back of the baby's neck. The anomaly scan is done at 18–22 weeks and is a comprehensive structural survey of all the baby's major organs and anatomy. They screen for fundamentally different things and neither replaces the other — both are recommended as part of complete antenatal care.
Medical Disclaimer
The content published on this website is intended for general informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified doctor or radiologist before making any health-related decisions. Usmanpura Imaging Centre does not provide medical advice through this blog. If you have a medical emergency, please contact your doctor or call emergency services immediately.
