20-Week Anomaly Scan India — What to Expect (TIFFA Scan Guide)

If your doctor has just told you it is time for your "TIFFA scan" or "Level 2 scan," you are probably wondering what makes this ultrasound different from the quick ones you have had so far. The answer: this is the most thorough scan of your entire pregnancy. It takes longer, it looks at far more detail, and it is the primary way doctors check that your baby's organs are developing normally.

Many expecting parents in India go into this appointment feeling anxious simply because they do not know what to expect. This guide walks you through it — what the scan checks, when to schedule it, how to prepare, how to read the report, and what actually happens if something is flagged.

What Is the 20-Week Anomaly Scan (TIFFA)?

TIFFA stands for Targeted Imaging for Fetal Anomalies. It is also called the Level 2 ultrasound, the anomaly scan, or the mid-trimester scan — different names for the same detailed examination. Unlike your earlier dating scan or NT scan, which take 10 to 15 minutes, the TIFFA scan is a systematic, head-to-toe survey of your baby's anatomy that typically takes 30 to 60 minutes.

The goal is straightforward: to check that the baby's brain, heart, spine, kidneys, limbs, and other major organs are forming and functioning as expected at this stage, and to assess the placenta, umbilical cord, cervix, and amniotic fluid volume. It is a screening test, not a guarantee — it identifies most major structural conditions, but no scan can detect every possible issue, and some conditions only become visible later in pregnancy or after birth.

What Exactly Does the Sonologist Check?

During the scan, the sonologist works through a standardised checklist. Understanding this list helps you follow along and ask informed questions during your appointment.

• Brain and skull: Ventricle size, cerebellum, and overall skull shape.
• Face: Profile, lips (to rule out cleft lip), and eye sockets.
• Spine: A full-length view to check for neural tube defects such as spina bifida.
• Heart: A four-chamber view plus outflow tracts — this is one of the most detailed parts of the scan, since congenital heart conditions are among the more common structural findings.
• Chest: Lungs and diaphragm.
• Abdomen: Stomach, kidneys, bladder, and the point where the umbilical cord inserts into the abdominal wall.
• Limbs: All four limbs, including hands and feet, are checked for normal length and positioning.
• Placenta and cord: Placental position (to flag a low-lying placenta or placenta previa) and the number of vessels in the umbilical cord.
• Cervix: Cervical length, particularly relevant if you have a history of preterm birth.
• Amniotic fluid: Volume is measured to rule out too much (polyhydramnios) or too little (oligohydramnios) fluid.
• Growth measurements: Head circumference, abdominal circumference, and femur length, used to estimate fetal weight and confirm the baby is growing on track for the dates.

When Should You Get It Done — And How to Prepare

The ideal window is 18 to 22 weeks, with 20 weeks being the sweet spot most doctors recommend. Earlier than 18 weeks, some structures — especially the heart and spine — are still too small to visualise clearly. Later than 22 weeks, the baby has less room to move, fetal position can block certain views, and amniotic fluid volume starts to change, all of which can make parts of the scan harder to complete in one sitting.

• No special fasting is required for this scan, unlike some abdominal ultrasounds.
• Drink water beforehand if your doctor recommends a comfortably full bladder — this varies by facility, so confirm with the clinic when you book.
• Wear comfortable, two-piece clothing so your abdomen is easy to access.
• Bring your previous scan reports and blood test results (including your first-trimester NT/dual marker screen), as the sonologist may refer to them for context.
• Bring your partner or a support person if possible — most facilities allow one person into the scan room, and it can be reassuring to have company for a scan this detailed.
• Set aside enough time. Because the baby needs to be in the right position for each view, the sonologist may ask you to walk around, change position, or wait a few minutes and try again. Do not book this appointment back-to-back with something else.

Understanding Your Report — Common Terms Explained

Anomaly scan reports are written for your doctor, not for a general reader, so they can look alarming even when everything is normal. Here are some of the most common terms parents search for after their scan:

"Soft markers"

A soft marker — such as an echogenic intracardiac focus (a small bright spot in the heart) or mild renal pelvis dilation (pyelectasis) — is a minor variation, not a diagnosis. Soft markers are seen in a meaningful percentage of entirely healthy pregnancies. Your doctor will interpret any soft marker together with your age, your first-trimester screening results, and the rest of the anatomy scan before deciding whether any follow-up is needed.

"Placenta previa" or "low-lying placenta"

This simply means the placenta is covering or close to the cervix at 20 weeks. In most cases, as the uterus grows, the placenta effectively "moves" away from the cervix by the third trimester. A follow-up scan around 32 weeks will confirm whether it has resolved.

"AC/HC/FL within normal limits"

This means the baby's abdominal circumference, head circumference, and femur length all match the expected range for the gestational age — in other words, growth is on track.

"Gender not disclosed"

Under India's PCPNDT Act, sonologists are legally prohibited from disclosing the baby's sex during this or any prenatal scan. This is a strict, non-negotiable legal requirement designed to prevent sex-selective practices, and it applies uniformly across every clinic and hospital in the country.

What If Something Is Flagged?

If the sonologist notes anything that needs a closer look, try to remember this: a flag on the anomaly scan is the start of a conversation, not a final answer. Here is what typically happens next.

It is completely normal to feel frightened if your doctor mentions a follow-up is needed. Ask direct questions: What exactly was seen? How common is it? What does the follow-up scan look for? What would change about my care plan? A good OB-GYN will walk you through this calmly and give you a clear next step rather than leaving you to search the internet for answers.

Cost of the Anomaly Scan in India

Pricing varies by city and facility, but as a general guide:

Most standalone health insurance plans in India do not cover routine antenatal ultrasounds unless you have a specific maternity add-on or a corporate maternity benefit. Check the terms of your policy before your appointment so there are no surprises.

Frequently Asked Questions

What is the 20-week anomaly scan called in India?

In India it is most commonly called the TIFFA scan (Targeted Imaging for Fetal Anomalies), also known as the Level 2 ultrasound, the anomaly scan, or the mid-trimester scan. It is the same detailed examination, just referred to by different names depending on the hospital or radiologist.

At what week should I get my anomaly scan done?

The ideal window is 18 to 22 weeks of pregnancy, with 20 weeks being the most common and best-balanced time. Before 18 weeks, some organs are too small to assess clearly. After 22 weeks, reduced amniotic fluid and fetal position can make certain views harder to obtain.

Does the anomaly scan take longer than a regular ultrasound?

Yes. A routine dating or growth scan takes 10 to 15 minutes, while a proper TIFFA scan takes 30 to 60 minutes because the sonologist is systematically examining and measuring every major organ system, the placenta, the cervix, and the amniotic fluid.

What does it mean if my anomaly scan report shows a soft marker?

A soft marker (such as an echogenic intracardiac focus or mild pyelectasis) is a minor variation that is seen in some completely healthy babies. It is not a diagnosis of a problem. Your doctor will interpret it in the context of your age, blood test results, and other scan findings, and may recommend a follow-up scan rather than immediate concern.

Is the anomaly scan covered under health insurance in India?

Most standalone health insurance policies in India do not cover routine antenatal ultrasounds, including the anomaly scan, unless bundled into a maternity add-on or a corporate maternity benefit. Costs typically range from Rs 1,500 to Rs 4,000 depending on the city and facility. Check your specific policy's maternity benefit terms before your appointment.

Final Words from Dr. Sai Sudha

The anomaly scan is one of the most important appointments in your pregnancy, and it is normal to feel a mix of excitement and nervousness before it. In my clinical experience, the vast majority of these scans come back completely reassuring — the baby's anatomy is exactly where it should be, and parents leave the appointment with genuine peace of mind.

Even when a finding needs a closer look, remember that this scan exists precisely so that any concern can be identified early, understood properly, and managed with a clear plan — whether that means monitoring, a specialist referral, or simply a follow-up scan to confirm everything is fine. Go into your appointment prepared, ask questions, and lean on your OB-GYN to walk you through the report line by line.