A ten-year-old Belgium girl gave birth to a baby boy last year, according to Expatica News.

The pregnancy came as a 'big' surprise to the girl, says Dr. Robert Chef who examined the girl.

According to Expatica, the doctor said the 10-year-old came to him with "unexplained abdominal pain." He said he noticed the girl gained some weight and after examining her, he discovered that she was nine months pregnant, the website reported.

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The father was reportedly a 13-year-old schoolmate.

According to Chef, the 10-year-old's grandmother said she would raise the baby as her own.