Here's an interesting concept for anyone trying unsuccessfully to get pregnant - rumpy-pumpy followed by white-knuckle rollercoaster action might just do the trick.

Cuban-born Nayade Elbing, 28, and her hubby had been hoping for children for several years, but their lack of offspring led Nayade to believe she was sterile, Ananova reports.

However, following a bit of beast-with-two-backs action at home in Hassloch, Germany, the couple nipped out to their local theme park where Nayade took another ride on the "Expedition GeForce" rollercoaster - said to be one of the world's speediest.

A week later, Nayade was confirmed pregnant. Gynaecologist Dr Thomas Gent said: "We believe that she conceived due to the G force of the rollercoaster ride."

The end result of this happy tale is Leandro Elias, now the proud owner of a free lifelong ticket for all the theme park's rollercoasters. ®

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