Being told that your baby may have clubfoot at the 20-week scan is one of the most unsettling moments of pregnancy. The anomaly scan is supposed to be the reassuring appointment where you see your baby wriggling and maybe find out the sex — so when the sonographer flags a concern about the feet, it can feel like the floor has dropped away. This guide covers what happens when clubfoot is suspected on the scan, what it means, and what comes next.
How Clubfoot Appears on the 20-Week Scan
The NHS Fetal Anomaly Screening Programme (FASP) ultrasound, performed between 18 and 21 weeks of pregnancy, assesses your baby's development across multiple body systems. The sonographer systematically checks the brain, heart, spine, abdomen, kidneys, limbs, and other structures.
When looking at the feet, the sonographer checks that both feet are in a normal position relative to the lower legs. In a healthy foot, the sole is roughly perpendicular to the shin bone when viewed from the side. In clubfoot, the foot appears turned inward and downward — the sole faces medially (toward the other leg) rather than downward.
What the sonographer may see:
- Persistent abnormal foot position — the foot consistently appears turned inward across multiple views. A normal baby may temporarily hold their feet in unusual positions, but a clubfoot will maintain the deformed position throughout the scan
- The "golf club" sign — when viewed from below, the foot and lower leg form a shape resembling a golf club, with the foot angled sharply inward
- One foot or both — the sonographer will assess each foot separately and note whether the finding is unilateral or bilateral
Detection Rates: How Reliable Is the Scan?
Clubfoot detection on the 20-week scan is not perfect. UK data shows:
- Overall sensitivity: approximately 60–80% of clubfoot cases are detected prenatally
- Bilateral cases are detected more reliably than unilateral cases (approximately 80% vs 60%)
- False positives do occur — some feet that appear abnormal on the 20-week scan turn out to be positional talipes (a benign condition that resolves on its own)
- False negatives also occur — some babies with clubfoot have normal-appearing 20-week scans and the condition is only identified at birth
The detection rate depends on multiple factors: foetal position during the scan, amniotic fluid volume, maternal body habitus, equipment quality, and the sonographer's experience and attention to the feet.
What Happens at the Scan Appointment
During the Scan
If the sonographer suspects clubfoot, they will typically:
- Take additional images of the feet from multiple angles to confirm the finding
- Explain what they've seen — the level of detail varies; some sonographers provide a clear explanation while others may say they need a consultant to review
- Complete the rest of the scan — checking all other structures is important because isolated clubfoot has a different prognosis from clubfoot associated with other anomalies
- Arrange a follow-up — you'll usually be referred for a detailed scan with a foetal medicine specialist
How the News Is Delivered
The experience of receiving this news varies significantly between hospitals. Some parents report being told sensitively with time to ask questions, while others describe feeling rushed or poorly informed. Common reactions include shock, tearfulness, confusion, and an immediate urge to research the condition.
If you don't feel you received adequate information at the scan, it's entirely reasonable to:
- Ask the sonographer to explain what they've seen in more detail
- Request written information or leaflets about clubfoot
- Ask how soon you'll be seen for a follow-up scan
- Ask for a contact number for the foetal medicine team in case you have questions before the follow-up
The Follow-Up Scan
After the initial 20-week scan identifies a possible clubfoot, you'll be offered a detailed follow-up scan, usually with a foetal medicine consultant. This scan has two purposes:
1. Confirm the Clubfoot Diagnosis
The specialist will take high-resolution images of the feet and lower legs to confirm whether the foot position is genuinely abnormal or whether it was a transient position on the initial scan. They may:
- Watch the feet over time during the scan to see if the position changes
- Assess the severity of the deformity (though prenatal severity assessment has limited accuracy)
- Determine whether one or both feet are affected
2. Check for Associated Conditions
In approximately 80% of cases, clubfoot occurs in isolation — meaning there are no other structural abnormalities. The foetal medicine specialist will carefully check for:
- Other skeletal anomalies — hand deformities, limb length differences, hip abnormalities
- Neurological signs — spinal defects (spina bifida), brain structure abnormalities
- Organ anomalies — heart, kidney, and abdominal structures
- Growth parameters — overall foetal size and proportions
- Amniotic fluid volume — low amniotic fluid (oligohydramnios) can cause positional deformities that mimic clubfoot
If the scan shows isolated clubfoot with no other anomalies, the outlook is very positive. Isolated idiopathic clubfoot is highly treatable with the Ponseti method, and outcomes are excellent.
If other anomalies are identified alongside the clubfoot, further investigations may be offered — see the section on amniocentesis below.
Amniocentesis: Will It Be Offered?
Amniocentesis (a procedure to test the baby's chromosomes from a sample of amniotic fluid) is not routinely offered for isolated clubfoot. This is because isolated idiopathic clubfoot is not associated with chromosomal abnormalities in the vast majority of cases.
Amniocentesis may be discussed if:
- Clubfoot is seen alongside other structural anomalies (this combination raises the probability of an underlying chromosomal or genetic condition)
- The combined first-trimester screening (nuchal translucency + blood tests) showed an elevated risk
- There is a family history of a specific genetic condition associated with clubfoot
- Parents request it after counselling about the risks and benefits
If amniocentesis is offered, you're under no obligation to accept. The decision is entirely yours, and the counselling session should give you enough information to make an informed choice.
Referral to the Orthopaedic Team
Once clubfoot is confirmed on the follow-up scan, most NHS centres will arrange a prenatal consultation with the orthopaedic team — either the paediatric orthopaedic consultant or a specialist Ponseti physiotherapist. This appointment may be:
- Face-to-face: at the hospital, often combined with another antenatal appointment
- Telephone or video call: some centres offer virtual consultations, particularly for straightforward information-sharing
- Written information pack: some units send comprehensive written materials about Ponseti treatment with an invitation to ask questions at a later appointment
At this consultation, you can expect to learn:
- What the Ponseti method involves — casting, tenotomy, bracing
- The treatment timeline — starting within 1–2 weeks of birth
- The expected outcomes — initial correction rates above 95%
- Practical information about NHS appointments and the treatment pathway
- Contact details for the team and when they'll want to see the baby after birth
Research shows that parents who receive prenatal counselling about clubfoot experience lower anxiety levels and feel more prepared for treatment than those who learn about the condition only at birth.
What to Do Between the Scan and the Birth
Reliable Information Sources
The urge to Google "clubfoot" immediately after the scan is universal. Focus on reliable sources:
- Steps Charity Worldwide (steps-charity.org.uk) — the leading UK charity for lower limb conditions, with excellent parent information on clubfoot
- NHS website — provides a basic overview of clubfoot and treatment
- This website — our parent guide and diagnosis guide cover the full treatment pathway in detail
Be cautious with:
- Image searches — Google Images for clubfoot shows the most severe, untreated cases from around the world. These are not representative of what your baby's foot will look like, especially after treatment
- Outdated information — anything written before 2005 may describe the older surgical approaches that are no longer standard in the UK
- Forum horror stories — people are more likely to post about negative experiences. The vast majority of clubfoot treatment stories are successful and unremarkable
Connecting with Other Parents
Many parents find that speaking to someone who's been through clubfoot treatment is the most helpful thing they can do before the birth. Options:
- Steps Charity parent support line — can connect you with a trained parent volunteer who's been through the process
- Hospital buddy schemes — some NHS units pair newly diagnosed families with experienced clubfoot parents
- Facebook groups — UK-specific clubfoot parent groups offer real-time advice and reassurance
Practical Preparation
- If your hospital is not the same one that will treat the clubfoot, confirm which hospital the orthopaedic referral has been made to
- Ask whether you need to contact the orthopaedic team after the birth or whether they'll contact you
- Check the distance and travel time to the clubfoot clinic — you'll be attending weekly during the casting phase
- Consider informing your employer that you may need additional time off for weekly hospital appointments after the birth
When Clubfoot Is NOT Detected at the 20-Week Scan
If your baby is born with clubfoot that was not detected prenatally, this is not a scanning error. As noted above, the detection rate for isolated clubfoot is 60–80%, meaning 20–40% of cases are not visible on the 20-week scan. Reasons include:
- The foot may have been in a normal position during the scan and the deformity developed or became apparent later in pregnancy
- Mild clubfoot is harder to detect than severe clubfoot
- Foetal position may have obscured the feet
Discovery at birth, while unexpected, does not affect treatment outcomes. The Ponseti method is equally effective whether the diagnosis is made prenatally or postnatally.
Frequently Asked Questions
Q: Can clubfoot be diagnosed before 20 weeks?
A: The foot structures are not sufficiently developed for reliable assessment before 18 weeks. The 20-week anomaly scan is the earliest point at which clubfoot can be detected with reasonable accuracy. Occasionally, a late first-trimester or early second-trimester scan may raise suspicion, but confirmation requires the detailed anomaly scan.
Q: Does a suspected clubfoot on the scan mean my baby definitely has it?
A: Not necessarily. False positives occur — the follow-up scan may show that the foot position has normalised, or the baby may be born with normal feet. Conversely, a finding of clubfoot on the scan is correct in the majority of cases. The follow-up scan with foetal medicine helps refine the diagnosis.
Q: Should I change my birth plan because of the clubfoot diagnosis?
A: Isolated clubfoot does not require any changes to your birth plan. You can still have a vaginal delivery, water birth, home birth, or any other planned approach. Clubfoot doesn't affect the delivery itself. The orthopaedic team will see the baby after birth, not during delivery.
Q: Will my baby be in pain from the clubfoot at birth?
A: No. Babies with clubfoot do not appear to be in pain. The foot is in a fixed position, and the baby has never known anything different. Treatment begins gently within the first 1–2 weeks and is not painful — though some babies find the manipulation uncomfortable, similar to any handling they might dislike.
Q: Can I request a 3D scan to see the clubfoot more clearly?
A: 3D and 4D scans can provide more detailed images of the feet, but they are not routinely offered on the NHS for this purpose. Some private scanning services offer 3D scans that might show the foot position more clearly. However, the diagnostic accuracy of 3D scanning for clubfoot is not significantly better than standard 2D ultrasound in experienced hands.