How Is Clubfoot Diagnosed?
Clubfoot can often be diagnosed by ultrasound (sonogram) examination before birth.
Approximately 10% of all clubfeet can be diagnosed by 13 weeks’ gestation, and about 80% can be diagnosed by 24 weeks’ gestation. However, diagnosis based on ultrasound alone produces a 20% false positive rate. This is because the normally shaped foot sometimes turns inwards momentarily as the baby wiggles his toes and feet, and if an ultrasound picture is made at that instant, the foot can have an atypical appearance.