Pregnancy is filled with exciting milestones, but it also comes with plenty of questions. Is the baby growing properly? Are the organs developing normally? Is the placenta in the right position? Is everything progressing as expected?
Among the different checks performed during pregnancy, the anomaly scan is one of the most detailed and important ultrasound examinations. Also known as the 20-week scan or mid-pregnancy scan, it gives healthcare professionals an opportunity to closely examine the baby’s physical development.
For parents, this scan can feel like a major milestone. You get to see your baby again, but more importantly, the scan provides valuable information about development that cannot always be assessed through routine pregnancy appointments.
The anomaly scan is generally performed during the second trimester, commonly around 18 to 21 weeks of pregnancy, although the exact timing can vary according to your healthcare provider and local protocols. During the examination, a trained sonographer uses ultrasound to examine several parts of the baby’s body, including the brain, face, spine, heart, abdomen, kidneys and limbs. The placenta and other aspects of the pregnancy may also be assessed.
If you are planning your pregnancy ultrasound in Hyderabad, discussing the appropriate timing and preparation with your doctor and a qualified diagnostic centre such as Iris Diagnostic can help you understand what to expect.
What Is an Anomaly Scan?
An anomaly scan is a detailed ultrasound examination performed during the middle part of pregnancy to assess the baby’s anatomy and development.
Unlike an early pregnancy scan that primarily focuses on dating the pregnancy, confirming viability or assessing early development, the anomaly scan provides a much more detailed look at the baby’s developing structures.
The scan can examine areas such as:
- Brain and skull
- Face and lips
- Spine
- Heart
- Stomach and abdomen
- Kidneys and bladder
- Arms and legs
- Bones and other visible structures
- Placenta
- Amniotic fluid
- Certain aspects of blood flow, where clinically appropriate
The purpose is not simply to produce a beautiful image of your baby. It is a medical examination designed to look for signs of certain physical or developmental conditions.
According to NHS pregnancy guidance, the 20-week screening scan can screen for signs of 11 specific conditions, although it is important to understand that ultrasound cannot identify every possible health condition.
That distinction is important. A normal
can provide reassuring information about the structures examined, but it should not be interpreted as a guarantee that every possible condition has been ruled out.
Why Is the Anomaly Scan So Important?
Every stage of pregnancy has its own purpose, and the second-trimester anomaly scan provides a detailed opportunity to evaluate fetal anatomy.
By this stage, many of the baby’s major body structures are developed enough to be examined in considerable detail through ultrasound.
One of the biggest benefits is that the scan may identify signs of certain structural abnormalities. If something unusual is seen, your doctor may recommend additional imaging, repeat scans, specialist consultation or other tests depending on the finding.
This does not automatically mean that something is seriously wrong.
Sometimes the baby may simply be in a position that makes a particular structure difficult to see clearly. The sonographer may need additional time or may recommend repeating part of the examination.
In fact, NHS guidance notes that the scan can sometimes take longer when the baby’s position makes obtaining clear images difficult.
For parents, understanding this beforehand can prevent unnecessary anxiety.
A request to repeat an image does not necessarily mean there is a problem. It can simply mean that the healthcare professional needs a clearer view.
When Should You Have an Anomaly Scan?
The timing of an anomaly scan is important because fetal structures need to be developed enough for detailed assessment, while the pregnancy should still be within the recommended screening window.
Many pregnancy-care guidelines place the examination around 18 to 21 weeks of pregnancy.
Some centres and clinical protocols may use a slightly different window. Therefore, it is best to follow the timing recommended by your obstetrician or healthcare provider.
If you are approaching the second trimester and have not yet discussed your detailed pregnancy ultrasound, speak with your doctor about when your anomaly scan should be scheduled.
At Iris Diagnostic, patients can discuss their diagnostic imaging requirements with the healthcare team and confirm the appropriate appointment details before attending.
What Does an Anomaly Scan Check?
One of the most common questions parents ask is: “What exactly will they look at during the scan?”
The answer is: quite a lot.
During an anomaly scan, the sonographer systematically evaluates different parts of the baby’s body.
1. Baby’s Brain
The brain and skull are examined for their general structure and development. The sonographer looks at specific anatomical features that can be assessed through ultrasound.
Certain abnormalities involving the brain or skull may be visible during the examination.
2. Face
The baby’s face is examined to assess visible facial structures. The sonographer may specifically look for signs of conditions such as cleft lip.
The baby’s position can affect how easily the face can be visualised.
3. Spine
The spine is carefully assessed along its length. The sonographer checks its appearance and alignment to look for signs of certain spinal abnormalities.
4. Heart
The heart is one of the key areas assessed during the anomaly scan.
The sonographer evaluates the heart’s appearance and specific views that help assess its structure. Some major cardiac abnormalities may be identified through prenatal ultrasound, although not every heart condition can be detected.
This is one reason why detailed fetal imaging requires appropriate training and careful examination.
5. Abdomen
The baby’s abdomen is examined, including structures such as the stomach and abdominal wall.
The sonographer checks whether these structures appear as expected for the stage of pregnancy.
6. Kidneys and Bladder
The kidneys and bladder are also assessed.
The bladder can sometimes be seen filling and emptying during the examination, while the kidneys are examined for their visible structure.
7. Arms, Legs and Bones
The baby’s limbs and major bones are examined for their development and appearance.
The sonographer may look at the arms, legs, hands and feet as part of the overall anatomical assessment.
8. Placenta
The anomaly scan also provides an opportunity to assess the placenta and its position.
Placental position can be important during pregnancy because a low-lying placenta may require follow-up assessment later in pregnancy.
9. Baby’s Growth and Amniotic Fluid
Measurements are taken to assess aspects of the baby’s growth.
The amount of amniotic fluid may also be considered as part of the ultrasound assessment.
The exact measurements and additional evaluations depend on the pregnancy and the healthcare provider’s protocol.
Does an Anomaly Scan Detect Every Problem?
This is perhaps the most important thing parents should understand.
An anomaly scan is detailed, but it is not capable of detecting every health condition or developmental problem.
Some conditions are difficult to see on ultrasound. Others may develop or become apparent later in pregnancy. The baby’s position, maternal factors, gestational age and image quality can also affect what can be visualised.
NHS guidance specifically states that the 20-week scan cannot find all conditions.
Therefore, the best way to interpret a normal scan is that the structures examined showed no concerning signs that could be identified during that examination.
It should not be interpreted as a guarantee that the baby has no health condition whatsoever.
This distinction helps parents approach the scan with realistic expectations while still appreciating how valuable the information can be.
Is the Anomaly Scan Safe?
Ultrasound uses sound waves to create images rather than ionising radiation.
Pregnancy ultrasound has been widely used in antenatal care. NHS guidance describes ultrasound scans as having no known side effects for mothers or babies when used appropriately.
During an anomaly scan, a trained professional applies ultrasound gel to the abdomen and moves a handheld transducer over the skin.
You may experience some pressure, especially when the sonographer needs a particular angle to obtain a clear image. It should not be considered a painful procedure.
The scan commonly takes around 30 minutes, although the duration can vary depending on the baby’s position and how easily all required views can be obtained.
What Happens During an Anomaly Scan?
Knowing what happens beforehand can make the appointment feel much less intimidating.
When you arrive for your anomaly scan, you may first need to complete registration and provide relevant pregnancy information.
You will then usually be asked to lie on an examination couch and expose the abdominal area.
A layer of ultrasound gel is applied to the skin. The sonographer then moves the transducer across your abdomen while viewing images on the ultrasound monitor.
The professional may remain quiet for periods while concentrating on obtaining specific images and measurements.
This silence does not necessarily indicate a problem.
A detailed scan requires concentration, and the sonographer may need to examine several structures from different angles.
Sometimes the baby cooperates immediately.
Other times, the baby may be facing away, curled into a difficult position or moving frequently. If an important view cannot be obtained, you may be asked to change position, walk around for a short time or return for another appointment.
This is a normal part of fetal ultrasound.
Can You See Your Baby During the Scan?
Yes, you will generally be able to see ultrasound images of your baby during the examination.
For many parents, this is one of the most memorable parts of pregnancy.
You may see your baby’s head, hands, feet, spine and movements on the screen. Depending on the baby’s position, some structures may be easier to see than others.
However, remember that the purpose of the anomaly scan is medical assessment first.
The sonographer needs to concentrate on obtaining the required views and measurements. So, although the experience can be exciting, there may be moments when the room becomes quiet while the examination is being performed.
Can the Anomaly Scan Tell You the Baby’s Gender?
Depending on the baby’s position and the policies of the diagnostic centre or hospital, it may sometimes be possible to determine the baby’s sex during the examination.
However, this is not the primary purpose of the anomaly scan, and it may not always be possible to provide a reliable answer.
If knowing the baby’s sex is important to you, ask about the centre’s policy before the scan.
More importantly, remember that the examination is primarily focused on assessing fetal anatomy and development.
What If the Doctor Finds Something Unusual?
Hearing that something needs a closer look can naturally make parents worried.
But an unusual or unclear finding does not automatically mean that your baby has a serious condition.
There can be several reasons for an uncertain ultrasound finding. Sometimes an image is unclear. Sometimes the baby’s position prevents a particular structure from being evaluated properly. Sometimes a finding may simply require another scan to understand it better.
If the anomaly scan raises a concern, your healthcare provider may recommend additional imaging, a repeat ultrasound or consultation with a specialist.
Depending on the situation, further diagnostic testing may also be discussed.
The important point is that screening identifies possible signs or increased likelihood, rather than providing certainty in every situation. Pregnancy screening tests may lead to additional tests when a concern is identified.
Your doctor should explain what has been seen, what it could mean and whether additional evaluation is recommended.
How Should You Prepare for an Anomaly Scan?
Preparation requirements can vary between diagnostic centres.
Some centres may provide specific instructions regarding your bladder, clothing or appointment time.
Before visiting Iris Diagnostic, confirm the preparation instructions given for your particular scan.
A few practical tips can make your appointment easier:
- Wear comfortable clothing that allows easy access to your abdomen.
- Carry your previous pregnancy scan reports.
- Bring relevant prescriptions or medical records if requested.
- Arrive a little early for registration.
- Follow any instructions provided by your diagnostic centre.
- Make a list of questions you want to ask your doctor.
- If you feel anxious, consider discussing your concerns before the examination begins.
Most importantly, do not hesitate to ask questions.
Understanding why the scan is being performed can make the experience more comfortable.
What If the Baby Is Not in the Right Position?
This is very common.
The baby’s position can significantly affect the quality of ultrasound images.
For example, if the baby has its back facing outward or is positioned in a way that blocks the face or heart, the sonographer may not immediately obtain the required views.
This does not mean there is a problem with your baby.
The sonographer may ask you to move, walk around briefly or wait before attempting another view. NHS guidance also notes that another appointment may sometimes be offered if clear images cannot be obtained.
So, if your first appointment does not produce every required image, try not to panic.
The priority is obtaining adequate medical information.
Anomaly Scan vs Routine Pregnancy Ultrasound
Although both involve ultrasound, they do not necessarily have the same purpose.
A routine pregnancy ultrasound may be performed to assess pregnancy dating, fetal growth, fetal position or other specific concerns.
An anomaly scan, on the other hand, is a structured second-trimester examination that focuses extensively on fetal anatomy.
For example, the earlier pregnancy scan may help establish gestational age, while the mid-pregnancy scan provides a more detailed assessment of the baby’s anatomical development.
Depending on your pregnancy, your doctor may recommend additional scans beyond the standard examinations.
This is especially relevant when there are specific risk factors or concerns about growth or development.
Why Parents Often Feel Reassured After the Scan
Pregnancy involves a lot of uncertainty.
You cannot see everything happening inside your body, and it is natural to wonder whether your baby is developing as expected.
The anomaly scan offers a detailed look at your baby’s development at an important stage of pregnancy.
When the examination does not identify concerning signs, many parents feel reassured knowing that the structures assessed appear to be developing as expected.
However, reassurance should come from understanding the findings rather than assuming that ultrasound can rule out every possible condition.
Your doctor can explain the results and tell you whether routine antenatal care is appropriate or whether additional monitoring is recommended.
Choosing a Diagnostic Centre for Your Pregnancy Scan
When choosing where to undergo an anomaly scan, parents often consider factors such as qualified imaging professionals, appropriate ultrasound equipment, appointment convenience, report availability and overall patient experience.
A diagnostic centre should also provide clear instructions about preparation and explain how reports will be shared.
If you are considering Iris Diagnostic for your pregnancy imaging needs, discuss the scan requirements with the centre before booking your appointment. Confirm the recommended gestational age, preparation instructions, expected reporting process and whether you need to bring previous reports.
Your obstetrician’s recommendation should remain an important part of deciding which diagnostic examination you need and when it should be performed.
Questions to Ask Before Your Anomaly Scan
Feeling prepared can make your appointment easier.
Consider asking:
1. When should I have my scan?
Confirm the ideal timing based on your pregnancy and your doctor’s recommendation.
2. Do I need any special preparation?
Ask whether you need a full bladder or any other preparation.
3. How long will the scan take?
The duration can vary depending on fetal position and image quality.
4. What happens if some images are unclear?
Knowing this in advance can prevent unnecessary worry.
5. When will I receive my report?
Ask about the reporting process at the diagnostic centre.
6. Should I bring previous reports?
Previous scans can provide useful context for your healthcare provider.
7. What happens if something unusual is seen?
Your doctor can explain what additional tests or follow-up may be recommended.
A Normal Scan Is Reassuring — But It Is Not a Guarantee
It is tempting to think of the anomaly scan as a complete health check for the baby.
It is not.
Instead, think of it as an important window into your baby’s development.
The examination can identify signs of several important structural conditions, but ultrasound has limitations. Some conditions cannot be detected, while others may not become apparent until later.
This is why continuing routine prenatal appointments remains essential even after a reassuring anomaly scan.
Your doctor may continue monitoring your blood pressure, baby’s growth, movements, maternal health and other aspects of pregnancy throughout the remaining months.
Each appointment adds another piece to the overall picture of your pregnancy.
When Should You Speak to Your Doctor?
You should always contact your pregnancy-care provider if you have concerns about your health or your baby’s wellbeing.
An ultrasound should not be used as a replacement for medical advice.
If you experience symptoms that concern you, do not wait for your next scheduled anomaly scan simply because you have an upcoming appointment.
Your doctor can determine whether you need an urgent assessment, additional monitoring or another investigation.
The Takeaway for Expecting Parents
The anomaly scan is an important second-trimester pregnancy ultrasound that provides a detailed assessment of the baby’s developing anatomy.
Usually performed around 18 to 21 weeks, it examines multiple structures, including the brain, face, spine, heart, abdomen, kidneys and limbs. It can also provide information about the placenta and other aspects of the pregnancy.
For parents, the scan can be both exciting and emotional.
You may see your baby’s movements on the screen while also receiving valuable information about development.
The most important thing is to approach the appointment with realistic expectations. A normal scan can be reassuring, but it cannot detect every possible condition.
If you are looking for pregnancy ultrasound services in Hyderabad, Iris Diagnostic can be one of the centres you discuss with your doctor when planning your diagnostic imaging.
Before booking, confirm the appropriate timing, preparation requirements and reporting process.
Most importantly, remember that every pregnancy is different. Your obstetrician or healthcare provider is the right person to interpret your scan results in the context of your individual pregnancy.
Frequently Asked Questions About Anomaly Scan
1. What is an anomaly scan?
An anomaly scan is a detailed ultrasound examination generally performed during the second trimester to assess the baby’s anatomy and development. It is also commonly called the 20-week or mid-pregnancy scan.
2. At what week is an anomaly scan performed?
The scan is commonly performed between 18 and 21 weeks of pregnancy, although the exact timing may vary according to your healthcare provider and local clinical protocol.
3. Is an anomaly scan painful?
An anomaly scan is generally not painful. You may experience some pressure on your abdomen while the sonographer moves the ultrasound probe to obtain different views.
4. What abnormalities can an anomaly scan detect?
An anomaly scan can screen for signs of several physical conditions involving structures such as the brain, spine, heart, face, abdomen, kidneys and limbs. However, it cannot detect every possible condition.
5. What happens if the baby is not in the correct position?
The sonographer may ask you to change position, walk around or wait briefly before trying again. If important images still cannot be obtained, another appointment may sometimes be recommended.
6. Can I know my baby’s gender during the anomaly scan?
It may sometimes be possible depending on the baby’s position and the diagnostic centre’s policy. However, determining sex is not the primary purpose of the anomaly scan.
7. Is a normal anomaly scan a guarantee that everything is perfect?
No. A normal anomaly scan is reassuring for the structures assessed, but ultrasound cannot detect every health or developmental condition. Continue your routine prenatal care as advised by your doctor.
8. Where can I get an anomaly scan in Hyderabad?
If your doctor has recommended an anomaly scan, you can discuss suitable diagnostic centres and appointment timing with your healthcare provider. Iris Diagnostic is a diagnostic centre that can be considered when planning your pregnancy imaging appointment.
9. What should I take for my anomaly scan appointment?
Carry your previous pregnancy scan reports and medical records if available, and follow the preparation instructions provided by your diagnostic centre. If you are visiting Iris Diagnostic, confirm the specific requirements before your appointment.
Book Your Pregnancy Scan with Iris Diagnostic
If your doctor has recommended a detailed pregnancy ultrasound, timely screening can help provide valuable information about your baby’s development. Speak with your healthcare provider about the appropriate timing and requirements for your examination.
For pregnancy ultrasound and diagnostic imaging enquiries, Iris Diagnostic is available to assist you with appointment-related information.
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Don’t delay an important pregnancy check-up. Contact Iris Diagnostic today to enquire about your appointment.