The Boy who Gave Birth to his Twin follows the heartrending story of the seven-year-old Kazakhstan boy who was admitted to hospital with a cyst, only for medics to discover he was actually carrying a parasitic foetus that had started life as his twin.

The Boy who Gave Birth to his Twin follows the heartrending story of the seven-year-old Kazakhstan boy who was admitted to hospital with a cyst, only for medics to discover he was actually carrying a parasitic foetus that had started life as his twin.

422 South has created explanatory 2D and 3D graphics for the Mentorn documentary, which goes out on 8 December on Channel 4.

The 2D sequences were designed and composited in After Effects and the 3D was done in Maya. The show explains how the twin became trapped in his brother's body, and investigates the acardiac condition some pregnant women expecting twins face.