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Trichy Fetal Medicine and Fertility Centre
Pregnancy scans

What Is a TIFFA Scan and When Should You Get It?

A TIFFA scan is a detailed ultrasound of your baby's anatomy, done around 18 to 22 weeks. Find out when to book it and who may need closer attention.

In this guide
Doctor performing an ultrasound on a pregnant woman beside a fetal scan monitor

Around the fifth month, many parents are told it is time for their TIFFA scan, often with little explanation. It is a detailed ultrasound of how the baby's organs and body have formed. This article explains what it examines, when to book it and who may need extra attention.

What is a TIFFA scan?

The name is widely used in India. The same examination may be called an anomaly scan, anatomy scan or 20-week scan, and centres differ a little in what their report covers.

Think of it as the difference between a quick check and a full inspection. Earlier scans confirm the heartbeat and growth. At the TIFFA scan the examiner works through the brain, face, spine, heart, abdomen, kidneys and limbs in turn, and also records where the placenta lies and how much fluid surrounds the baby. Our anomaly scan guide walks through each of these structures.

When should you get a TIFFA scan?

The usual window is 18 to 22 weeks, and many doctors aim for around 20. Before 18 weeks some structures are too small to assess properly, and later the baby's size and position can make certain views harder.

Do not leave it late. If the scan raises a question, you may need a repeat scan, a fetal heart scan or a genetic counselling session, and arranging these takes a little time. If your due date was revised after your first scan, confirm with your doctor which week to count from.

Who may need a TIFFA scan?

Most obstetricians recommend it for every pregnancy. Some situations make it more important, and a few may call for a specialist to perform it:

  • An earlier scan or screening test (NT scan, double marker or NIPT) showed something worth a second look
  • A previous baby had a structural or genetic condition, or there is a relevant family history
  • The mother has diabetes or another medical condition, or took certain medicines early in pregnancy
  • You are carrying twins, or conceived after fertility treatment

Having one of these does not mean something is wrong. It means your doctor wants a careful look.

What to expect on the day

The scan is done on the abdomen and is painless. Most centres ask for no special preparation, though it is worth confirming when you book. Allow extra time, because there is a lot to cover.

If the baby is lying in an awkward position, the sonographer may ask you to walk around for a few minutes or return later. A callback usually means only that a view was incomplete. The baby's sex will not be disclosed, as sex determination is prohibited in India under the PCPNDT Act.

What the scan cannot tell you

Some differences are very small, some only show up as pregnancy advances, and many genetic conditions need separate tests. The heart is a common source of confusion. The TIFFA scan includes the main heart views, but a fetal echocardiogram is a more detailed heart scan, advised when there is a specific reason such as a screening finding or family history.

If something unexpected is seen, the usual next step is a closer look, not an immediate conclusion.

When to speak to a fetal medicine specialist

A specialist opinion is worth seeking if your report mentions a finding, if part of the scan could not be completed, or if your history makes you want a more detailed assessment. Patients seeking fetal medicine consultation in Trichy can contact Trichy Fetal Medicine and Fertility Centre through the official website.

What this means for you

Treat the TIFFA scan as a planned check rather than a test to dread. Go within the window your doctor suggests, carry your earlier reports, and ask for the findings to be explained in plain language before you leave.

If your doctor has suggested this, our anomaly scan page lists what is included and how to book; the team is happy to talk it through first.

Common questions

Sources

  1. Khalil A, et al. ISUOG Practice Guidelines (updated): performance of the routine mid-trimester fetal ultrasound scan. Ultrasound in Obstetrics & Gynecology, 2022. · isuog.org
  2. NHS. 20-week screening scan. · nhs.uk

This guide is for general information and does not replace a consultation with a fetal medicine specialist.

In line with the PCPNDT Act, we do not perform or support sex determination.

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