The Swedish photographer Lennart Nilsson, who became world famous for his documentation of pregnancy from conception to birth, was asked by the magazine "Life" to photograph Birgit Nilsson's vocal cords as she sang high C. Birgit Nilsson turned the proposal down with the words "Your photographer wants me to swallow the tiny camera so he can take pictures of the vocal cord . I don't want that, since I know where it has been before." Eventually, though, she agreed on having the pictures taken.