When Harvey Price was born, no one knew of his complex conditions and the challenges he would face. He was later diagnosed with a rare genetic disorder, Prader-Willi syndrome and Septo-Optic Dysplasia which effects his brain function, hormones, vision and leads to struggles with hunger and being overweight.
Harvey was also diagnosed as autistic and has a long list of other behavioural and medical conditions, which gives him an unpredictable future as he ventures into adulthood.
The 18-year-old has a cognitive understanding of close to a seven-year-old and complex hormone issues which means he can't control his weight. "Every time I've had a kid I've just wished them happy and healthy," explains Katie on her eye-opening new BBC documentary
Read more on mirror.co.uk