A baby born with three legs has had his extra limb successfully removed at the age of 11 months after 10 hours of surgery.

The video, filmed in Shanghai on March 19, shows the boy - nicknamed Xiao Fei - with a third limb protruding from his groin area, in between his two other legs.

According to reports, the extra leg belonged to a parasitic twin.

Since Xiao Fei's mum did not attend regular pregnancy check-ups, the parasitic twin had not been detected before his birth.

Surgeons removed his extra leg and corrected his deformed right leg successfully in the operation.

Parasitic twins are rare and only occur in around one in a million live births, reports said.