Unbelievable! Meet The Smallest Baby Boy Ever To Be Born Weighing Just 0.4kg (Photos) The tiny baby was born weighing less than a block of butter The world's smallest surviving baby ever has finally been allowed to return home after spending six months in hospital. The teeny newborn - who hasn't yet been named - was born last August weighing 0.59lbs - less than a block of butter. He was born via emergency c-section at Keio University Hospital in Tokyo after doctors noticed that he wasn't growing during a 24-week scan. They decided to operate for fear that his life might be in danger.
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