The 26-year-old Australian professional motorcycle rider's wife Adriana gave birth to a baby girl named Alessandra Maria Stoner in Lausanne in Switzerland late on Thursday evening (February 16).
According to the Herald Sun, Alessandra was born weighing 2.8kg. A spokesperson for Stoner's Honda team said: "Mum and baby are perfect with no complications."
The couple are based near Lausanne to fit in with Stoner's European MotoGP timetable. He is scheduled to soon start pre-season testing at the Sepang circuit in Malaysia and hopes to defend the championship that he won last year.
Stoner was scheduled to visit Japan for a MotoGP race when he discovered that Adriana was pregnant in August last year, but said that he had second thoughts about going because of the country's nuclear risk following fallout at the Fukushima I power plant.
He said: "I felt very strongly that I wasn't going to go there after things I'd seen and heard. But that came from a very strong emotion after we found out that Adriana was pregnant. There was no way I was going to risk my wife or my family and it was very tough."
The race, originally scheduled for April, was postponed until October, with Stoner finishing third.
Stoner won world championships in both 2007 and 2011, and was named 'Young Australian of the Year' in 2008.
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