As an apparently healthy 18-year-old, Gemma Fawcett thought she had all the time in the world to start a family. But there then followed three years of unsuccessful attempts with her fiancÈ John ...

I was shaking and utterly terrified. 'I explained that she would have badly hurt herself but all she thinks about is her weight and how unhappy it makes her. 'She is surrounded by children's TV ...