Lady Louise Windsor was once called the Royal Family's "secret weapon," and as the daughter of the Duke and Duchess of Edinburgh turns 21 on Nov. 8, it's frightening to think that both she and her mother came very close to losing their lives in 2003.
Louise—who, as Prince Edward's child, is a granddaughter of the late Queen Elizabeth and Prince Philip—is the eldest of Edward and Duchess Sophie two children. The duchess experienced a normal pregnancy, but on Nov. 8, 2003, she started to experience "crippling abdominal pains," per the Daily Mail.
