In July 1933, the new German Chancellor, Adolf Hitler, passed 'The Law for the Prevention of Offspring with Hereditary Diseases'.
It required the sterilisation of Germans with physical and mental disabilities. Helga Gross was one of those sterilised.
Ben Henderson uncovers archive interviews from the United States Holocaust Memorial Museum, recorded in 2003.
(Photo: Helga Gross as a child. Credit: United States Holocaust Memorial Museum)