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The Grand National at Aintree is renowned for its fairytale winners and the 2012 race provides the potential for a groundbreaking victory.
On Saturday, two women have leading claims to become the first female jockey to win the gruelling four-and-a-half-mile race over 30 demanding fences.
Women in the National
The best finish by a female rider in the Grand National is fifth, which has been achieved twice - by Rosemary Henderson (Fiddlers Pike, 1994) and Carrie Ford (Forest Gunner, 2005)
Only four of the 14 women jockeys to take part have completed the race
Two women have trained National winners - Jenny Pitman (Corbiere 1983 and Royal Athlete 1995) and Venetia Williams (Mon Mome 2009)
Amateur Irish riders Katie Walsh and Nina Carberry will not only have to beat history, and each other, but their own National-winning elder brothers who are competing against them.
Katie is aboard Seabass for her trainer father Ted after brother Ruby chose to partner On His Own for Willie Mullins.
Nina is on the 2011 Irish Grand National winner Organisedconfusion for trainer uncle Arthur Moore, while her brother Paul rides the Gordon Elliott-trained Chicago Grey.
In February, Nina married Ted Walsh Jnr - Katie and Ruby's brother - with Katie as bridesmaid and Ruby Walsh the best man.
Bookmakers rate it a 10-1 chance that one of the women will triumph and Katie, 27, believes that time is approaching as she prepares for her first National ride.
"We're not treated any differently and we wouldn't expect to be, but at some stage a woman is going to win a Classic on the Flat or the Grand National and I just hope it's me," said Katie, who walked the course with Ruby on Thursday.
"I'm looking forward to it - it's a great opportunity and I might never have a ride in the race again so I just want to enjoy the whole thing."
Her father Ted easily reels off all his daughter's victories one by one, including the win on Seabass at Limerick in December which was her 10th over fences and meant she qualified to ride in the National.
Nina Carberry has a good record at Aintree
Victory would provide the ideal present on his 62nd birthday, and he admitted winning this time might be even more special than the 2000 National when Ruby scored on Papillon.
"That was 12 years ago and this would probably be even better," he said.
"I hope Katie comes back with a smile on her face, wherever she finishes."
And if his daughter was to deny his son?
"I'd say Ruby would be more pleased if Katie won it than if he won it himself," says Ted.
Nina has completed the National on all three of her previous rides - finishing ninth on Forest Gunner in 2006 and seventh and 15th with Character Building in the last two runnings.
She said friendship and family loyalties will be put to one side as 40 runners line up for the big race.
The Australian said it would bear echoes of the classic 1940s movie
in which a young Elizabeth Taylor played a schoolgirl who realised her dream by winning the Grand National on her beloved horse The Pie.
"The dream story for me would be Nina Carberry beating Katie Walsh after the two sisters-in-law are involved in a tussle around The Elbow and up to the finish," he said.
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