Bilateral clubfoot is a condition where both feet turn inward and downward at birth, affecting the bones, muscles, and tendons in each foot. It occurs in roughly half of all clubfoot cases, with the other half affecting just one foot. Overall, clubfoot appears in about 0.6 to 1.5 out of every 1,000 live births worldwide.
What Bilateral Clubfoot Looks Like
In a clubfoot, four distinct components combine to create the characteristic shape. The arch of the foot is abnormally high. The front of the foot angles inward toward the body’s midline. The heel tilts inward so the sole faces the opposite foot. And the entire foot points downward, as if the baby is trying to stand on tiptoe. All of these features result from shortened muscles and tight tendons pulling the foot into position.
When both feet are affected, the deformity is symmetrical. Parents often notice that a newborn’s feet look twisted or curled, with the soles facing each other rather than pointing down. The feet are not painful for the baby at birth, but without treatment, walking normally later in life would be extremely difficult.
Causes and Risk Factors
The exact cause of clubfoot isn’t fully understood. It likely involves a combination of genetic and environmental factors. A child whose parent or sibling has clubfoot faces a higher risk, suggesting a hereditary component.
Smoking during pregnancy raises the baby’s risk. So does oligohydramnios, a condition where there isn’t enough amniotic fluid surrounding the baby in the womb. Low fluid may physically restrict how the feet can move and develop. In many cases, though, clubfoot appears with no identifiable risk factor at all.
How It’s Diagnosed
Clubfoot can sometimes be spotted on ultrasound as early as 9 weeks of pregnancy, though it’s more reliably identified during the routine anatomy scan around 18 to 20 weeks. Prenatal detection isn’t perfect: the false-positive rate for ultrasound diagnosis runs as high as 10 to 19 percent, meaning some feet that look affected on imaging turn out to be normal at birth. A definitive diagnosis comes from a physical examination of the newborn.
When clubfoot is detected before birth, parents have time to connect with a specialist and understand the treatment plan before the baby arrives. This is especially helpful with bilateral clubfoot, since treatment will need to address both feet simultaneously.
Treatment With the Ponseti Method
The standard treatment for clubfoot, including bilateral cases, is the Ponseti method. It starts in the first weeks of life and relies on gentle, repeated manipulation of the feet followed by plaster casts that hold each correction in place while the ligaments gradually soften and stretch.
A trained provider carefully moves the foot toward a more normal position during each visit, then applies a long leg cast from the toes to the upper thigh with the knee bent at a right angle. Casts are typically changed weekly, though some centers now change them every five days. Most feet need five to seven casts to achieve full correction. Even very stiff feet rarely require more than eight or nine.
Before the final cast, the Achilles tendon at the back of the ankle often needs to be released. This is a minor office procedure, not a full surgery. A small cut allows the tight tendon to lengthen, and the last cast stays on for about three weeks while the tendon heals and regenerates at the proper length. For bilateral clubfoot, both feet go through this process at the same time, so the baby will have casts on both legs throughout treatment. The entire casting phase typically wraps up in six to eight weeks.
The Bracing Phase
Casting corrects the position of the feet, but without ongoing maintenance the deformity tends to come back. That’s where bracing comes in. After the final cast is removed, the baby wears a brace: a bar connecting two small shoes that hold the feet in a corrected position.
For the first three months or so, the brace stays on nearly around the clock, coming off only for baths. After that initial stretch, it shifts to naps and nighttime only. This schedule continues for two to five years total. The brace doesn’t delay walking. Children learn to crawl and pull themselves up on the same timeline as their peers, and they walk in regular shoes during the day once they’re past the full-time phase.
Consistency with bracing is the single biggest factor in preventing relapse. Families who stick closely to the schedule see significantly lower rates of the clubfoot returning.
What to Expect Long Term
When clubfoot is treated early and effectively with the Ponseti method, most children develop feet that function well for everyday life. They can run, play, and participate in sports. A treated clubfoot may always be slightly smaller than average. In unilateral cases, the affected foot tends to be about 1 centimeter shorter and 0.7 centimeters narrower than the other foot. With bilateral clubfoot, both feet may be somewhat smaller than expected for the child’s age, though because both are affected, the difference between the two feet is less noticeable.
Calf muscles on the affected side are often somewhat weaker and thinner than normal, even into adulthood. This is more of a cosmetic observation than a functional limitation for most people treated with the Ponseti method, though it can affect endurance during intense physical activity.
Older studies tracking patients who underwent extensive surgery rather than the Ponseti method paint a less favorable picture. In one long-term follow-up of surgical patients, 42 percent walked with a limp, and many experienced foot pain during daily activities or after exercise. Calf weakness was common, and a significant number couldn’t perform basic tasks like walking on their toes or heels. These outcomes are a key reason the medical community shifted toward the gentler, casting-based Ponseti approach, which produces better mobility and fewer complications over a lifetime.
How Bilateral Differs From Unilateral
The underlying condition is the same whether one or both feet are involved, and the treatment follows the same steps. The practical differences are mostly logistical. Both legs are casted at once, which makes carrying and diapering a bit more challenging for parents during the casting weeks. Bracing is actually simpler in bilateral cases because the bar-and-shoe brace is designed for two feet by default.
Children with bilateral clubfoot also don’t develop the leg-length or foot-size asymmetry that can sometimes occur in unilateral cases. Both legs and feet grow together, which can make shoe fitting easier in the long run. Functionally, children treated for bilateral clubfoot reach the same milestones as those treated for a single affected foot.