United Kingdom, June 11 -- Lucille Ball found out she was pregnant from a radio broadcast.

The late comedienne - who was mother to Lucie, 73, and Desi Jr, 72, with husband Desi Arnaz - had some tests done shortly before learning she was expecting her eldest, but a new biography has alleged that a broadcaster learned of the news first after being "tipped off" by the medical lab.

In Desi Arnaz: The Man Who Invented Television, Todd S. Purdum writes: "In June 1950, during the New York run of their vaudeville show, Lucy was relaxing in her dressing room between shows listening to Walter Winchell's radio broadcast when she heard him announce she was 'infanticipating,' the columnist's lingo for 'pregnant.' He'd been tipped off by a medical la...