Structural Abnormality in Pregnancy Scan: Is Termination Always Necessary?
Finding a possible abnormality during a pregnancy ultrasound can be frightening for expectant parents. The first thought may be: “Is my baby going to be okay?” or “Does this mean the pregnancy must be terminated?”
The answer is no—not every structural abnormality in a pregnancy scan requires termination.
Some fetal abnormalities are isolated, mild or treatable after birth. Others may require further investigation, closer monitoring, genetic testing or delivery at a hospital with specialised newborn facilities. Certain severe conditions may have serious implications, but a decision should never be made based only on an initial scan finding.
The correct next step is to understand:
- What abnormality has been detected
- Whether the finding is confirmed
- How severe the condition is
- Whether other abnormalities are present
- Whether it may be associated with a genetic condition
- What treatment options are available
- What the expected outcome may be
Parents should consult their treating gynaecologist and obtain an evaluation from a fetal medicine specialist before making any major pregnancy-related decision.
Important: Every pregnancy and every fetal abnormality is different. Online information cannot replace individual assessment and counselling from qualified medical professionals.
Watch our video on: Structural Abnormality in Pregnancy Scan
What Is a Structural Abnormality in a Pregnancy Scan?
A fetal structural abnormality is a diffgive in the formation or development of a part of the baby’s body.
It may involve the:
- Brain or spine
- Face, lips or palate
- Heart or major blood vessels
- Chest or lungs
- Abdomen or abdominal wall
- Kidneys or urinary system
- Arms, legs, hands or feet
- Bones and skeletal system
A structural abnormality may be suspected during an NT scan, anomaly scan, fetal echocardiography, growth scan or another pregnancy ultrasound.
The anomaly scan, also called a TIFFA scan, examines the baby’s visible organs and body structures in detail.However, an ultrasound scan cannot detect every possible congenital, genetic or developmental condition.
Sometimes, a suspected abnormality requires a repeat or specialised ultrasound before it can be confirmed.
Does Every Fetal Structural Abnormality Require Termination?
No. Fetal structural abnormalities vary considerably in their severity, treatment possibilities and expected outcomes.
They may broadly include:
Isolated and Treatable Conditions
Some abnormalities affect only one part of the baby’s body and may be treated after birth. Examples can include isolated clubfoot and certain cases of cleft lip or cleft palate.
Conditions Requiring Monitoring
Some findings may not require immediate treatment but may need regular pregnancy scans to monitor the baby’s growth, development and overall well-being.
Conditions Requiring Specialised Care After Birth
Certain abnormalities may require the baby to be delivered at a hospital with paediatric specialists, neonatal intensive care or surgical facilities.
Conditions Associated with Genetic Abnormalities
Some structural findings can be associated with chromosomal or genetic conditions. Additional testing may be recommended to understand whether an underlying genetic abnormality is present.
Severe or Life-Limiting Conditions
A small number of abnormalities can significantly affect the baby’s survival or long-term health. In such cases, parents require detailed and sensitive counselling about the prognosis, available care and pregnancy-management options permitted under applicable law.
Therefore, detecting a structural abnormality in a pregnancy scan does not automatically mean termination is necessary.
Examples of Structural Abnormalities That May Be Treatable
Clubfoot
Clubfoot, also known as talipes, causes one or both of the baby’s feet to turn inward or downward.
When it is an isolated condition, treatment after birth can often provide favourable results. Treatment may include gentle manipulation, plaster casts, braces and, in some cases, a minor procedure or surgery.
However, when clubfoot is detected during pregnancy, the fetal medicine specialist will usually examine the rest of the baby carefully. This is because clubfoot can occasionally occur along with abnormalities involving the spine, brain or another organ.
Clubfoot detected during an ultrasound should be properly evaluated, but its presence alone does not automatically mean that the pregnancy must be terminated.
Cleft Lip and Cleft Palate
A cleft lip is an opening or separation in the baby’s upper lip. It may occur alone or together with a cleft palate.
Many children born with a cleft lip or palate can receive treatment after birth. Depending on the condition, the child may require care from:
- Paediatric or plastic surgeons
- Feeding specialists
- Speech therapists
- Dentists or orthodontists
- Ear, nose and throat specialists
If a cleft is suspected during a pregnancy scan, a detailed assessment may be advised to check whether it is an isolated finding or is associated with another condition.
Certain Heart Abnormalities
Congenital heart abnormalities can range from mild findings that require observation to complex conditions requiring treatment after birth.
If the anomaly scan shows a possible heart abnormality, a fetal echocardiography scan may be advised. This specialised ultrasound evaluates:
- The heart chambers
- Heart valves
- Major blood vessels
- Heart rhythm
- Blood flow through the baby’s heart
Detecting a heart condition during pregnancy can help doctors plan follow-up scans, the place of delivery and newborn treatment.
What Additional Scans May Be Recommended?
The tests recommended will depend on the suspected abnormality.
Detailed or Targeted Ultrasound
A targeted ultrasound examines the suspected abnormality more closely and evaluates the rest of the baby for additional findings.
A repeat scan may also be recommended when the baby’s position or another technical limitation prevented complete examination.
Fetal Echocardiography
A fetal echo may be recommended when a heart abnormality is suspected or when another finding increases the possibility of a congenital heart condition.
Follow-Up Growth Scans
Some abnormalities may affect the baby’s growth or be associated with placental problems. Follow-up scans can help assess fetal growth, amniotic fluid and overall well-being.
Fetal Doppler Scan
A fetal Doppler scan evaluates blood flow in selected maternal and fetal blood vessels. It may be advised when there are concerns about fetal growth, placental function or the baby’s well-being.
Fetal MRI
In selected cases, a fetal MRI may provide additional information—particularly when the brain, spine, chest or another complex structure requires further evaluation.
Fetal MRI is not required for every structural abnormality.
Why Is Further Evaluation Important?
1. Do Not Panic or Make an Immediate Decision
Hearing words such as “abnormality,” “anomaly” or “birth defect” can be emotionally overwhelming. However, the first scan finding may require confirmation.
Ask the doctor:
- What exactly was seen?
- How certain is the finding?
- Is another scan required?
- Does it appear to be isolated?
- Are any additional tests necessary?
- What treatment options may be available?
Avoid making decisions based only on social media, general online information or another family’s experience. Two babies with a similarly named abnormality may have very different associated findings and outcomes.
2. Consult Your Treating Gynaecologist
Your gynaecologist will review the ultrasound report along with:
- Your gestational age
- Previous pregnancy scans
- Blood-test and screening results
- Medical and family history
- Previous pregnancy history
- The baby’s growth and well-being
Your doctor can then guide you regarding further scans, specialist referrals and additional investigations.
3. Consult a Fetal Medicine Specialist
A fetal medicine specialist is trained to evaluate high-risk pregnancies and suspected fetal abnormalities.
The specialist may perform a detailed targeted ultrasound to:
- Confirm or clarify the initial finding
- Examine the affected organ carefully
- Look for additional abnormalities
- Assess the baby’s growth
- Evaluate the placenta and amniotic fluid
- Determine whether another specialist should be consulted
Depending on the finding, parents may also be referred to a:
- Paediatric cardiologist
- Paediatric surgeon
- Paediatric orthopaedic surgeon
- Neonatologist
- Clinical geneticist
- Genetic counsellor
4. Complete Recommended Genetic Tests
Some structural abnormalities may be associated with chromosomal or genetic conditions.
Depending on the scan findings, gestational age and previous screening results, the doctor may discuss:
- Non-invasive prenatal screening or NIPT
- Chorionic villus sampling or CVS
- Amniocentesis
- Karyotyping
- Chromosomal microarray analysis
- Other specialised genetic investigations
Parents should understand that screening and diagnostic tests are not the same.
NIPT is a screening test. It estimates the likelihood of certain chromosomal conditions but does not provide the same confirmation as a diagnostic test such as CVS or amniocentesis.
Not every patient requires every test. The appropriate investigation must be decided by the treating medical team.
5. Consider a Second Opinion
A second opinion may be useful when:
- The diagnosis is uncertain
- The abnormality is complex
- The first scan was technically limited
- Different treatment possibilities are being discussed
- A major pregnancy decision is being considered
- Parents require greater clarity about the prognosis
The second opinion should preferably be obtained from a qualified fetal medicine specialist or an appropriate tertiary-care centre.
Carry all previous scan reports, laboratory results, prescriptions and medical records to the consultation.
6. Understand the Treatment Options and Prognosis
The word “abnormality” alone does not explain how the condition may affect the baby.
Parents should ask:
- Can the condition be treated after birth?
- Will the baby require surgery?
- When would treatment be needed?
- Is the necessary treatment available locally?
- Could the condition affect the baby’s development?
- Will the baby require neonatal intensive care?
- Where should the delivery take place?
- What are the possible outcomes?
- Could the condition affect future pregnancies?
When appropriate, meeting the paediatric specialist who may treat the baby after birth can help parents understand the expected care.
Why Does It Matter Whether the Finding Is Isolated?
An isolated abnormality may have a different expected outcome from the same condition accompanied by additional abnormalities.
For example, isolated clubfoot may be treatable after birth. However, if abnormalities involving the brain, spine, heart or other organs are also present, the doctor may investigate the possibility of an underlying syndrome or genetic condition.
This is why the specialist must evaluate the baby systematically rather than concentrating only on the initially detected problem.
Can a Pregnancy Scan Detect Every Abnormality?
No. Even a carefully performed anomaly scan cannot detect every congenital, genetic or developmental condition.
Some abnormalities:
- May be too small to identify before birth
- May develop or become visible later
- May not produce a visible structural change
- May be difficult to assess because of the baby’s position
- May involve function rather than visible anatomy
- May be affected by technical or maternal factors
A normal scan is reassuring, but it cannot guarantee that the baby has no medical, genetic or developmental condition.
Similarly, a suspected abnormality during one scan may sometimes appear differently during a detailed specialist assessment.
Planning Care When the Pregnancy Is Continued
When parents decide to continue the pregnancy, the medical team may prepare an individual care plan.
Depending on the condition, the plan may include:
- More frequent pregnancy scans
- Monitoring the baby’s growth and blood flow
- Consultation with paediatric specialists
- Delivery at a tertiary-care hospital
- Availability of neonatal intensive care
- Immediate examination after birth
- Planned medication, treatment or surgery
- Emotional and psychological support for the family
Some abnormalities may not change the timing or method of delivery. Others may require delivery at a hospital where specialised care is immediately available.
Questions to Ask the Fetal Medicine Specialist
Consider asking the following questions during your consultation:
- What structural abnormality has been detected?
- How certain is the diagnosis?
- Is the abnormality isolated?
- Are any other organs affected?
- How severe is the condition?
- Are additional scans required?
- Is genetic counselling recommended?
- Do we need screening or diagnostic testing?
- Can the condition be treated after birth?
- Will the baby require surgery or intensive care?
- What is the expected long-term outcome?
- Where should the delivery take place?
- Is a second opinion recommended?
- How frequently should the pregnancy be monitored?
Writing down the answers can help parents review the information later when they feel calmer.
Frequently Asked Questions
Is termination always necessary when an abnormality is detected in a pregnancy scan?
No. Some abnormalities are isolated, mild or treatable after birth. The decision depends on the type and severity of the condition, associated findings, genetic-test results and expected outcome.
Does clubfoot detected during pregnancy require termination?
Isolated clubfoot is often treatable after birth and does not automatically require termination. A detailed scan may be advised to confirm that it is isolated.
Can cleft lip be treated after birth?
Many cases of cleft lip and cleft palate can be treated after birth through surgery and multidisciplinary care. The treatment plan depends on the type of cleft and associated findings.
Why is genetic testing advised after an abnormal scan?
Some structural abnormalities may be associated with chromosomal or genetic conditions. Testing may help clarify the diagnosis and support counselling and treatment planning.
Is NIPT enough to confirm a genetic abnormality?
No. NIPT is a screening test rather than a diagnostic test. If confirmation is required, the doctor may discuss diagnostic testing such as CVS or amniocentesis.
Should parents obtain a second opinion?
A second opinion can be helpful when the diagnosis is complex or uncertain, or when the finding may influence a major pregnancy decision.
Can every fetal abnormality be detected during pregnancy?
No. Ultrasound can identify many structural abnormalities, but it cannot detect every genetic, functional or developmental condition.
What should parents do immediately after receiving an abnormal scan report?
Do not panic or make an immediate decision. Consult your gynaecologist, obtain a fetal medicine evaluation and complete the investigations recommended for your specific case.
Final Message for Parents
A structural abnormality in a pregnancy scan does not always mean that termination is necessary.
Some conditions may be isolated and treatable after birth. Others may require closer monitoring, genetic testing, specialist treatment or planned delivery at an appropriate hospital. A smaller number may have serious implications and require detailed counselling.
The most important steps are:
- Remain calm and obtain a clear explanation
- Consult your treating gynaecologist
- Seek evaluation from a fetal medicine specialist
- Complete recommended scans or genetic tests
- Understand treatment options and prognosis
- Consider a second opinion when needed
- Make an informed decision after proper medical counselling
Every pregnancy is different. Decisions should be based on confirmed findings, specialist advice and a complete understanding of the baby’s condition—not fear following the first scan report.
Founder of Nisarga Diagnostics, is a renowned fetal ultrasound specialist with over 20 years of expertise. An alumnus of Government Medical Colleges in Mysore and Bangalore, he also holds a D.N.B. from the National Board of Examinations, Delhi, and certification from the Fetal Medicine Foundation, London. A former Professor and HOD, he has trained countless PG students and junior radiologists, shaping the future of fetal imaging in India.