Rachael Blackmore has been taken to hospital for further assessment on an upper leg injury following a fall at Killarney on Friday afternoon.
Blackmore, who reigned supreme at Cheltenham and Aintree last season with a number of high-profile victories, took a crashing fall from Merry Poppins in the Download The BoyleSports App Handicap Hurdle after scoring on Baltinglass Hill in the preceding race.
The 32-year-old was attended to on track by medics before being moved into an ambulance.
Dr Richard Downey, the racecourse doctor, reported that the Grand National hero was "fully conscious" after her spill.
In March Blackmore became the first woman to ride the winner of the Champion Hurdle at Cheltenham, aboard the brilliant mare Honeysuckle, and her six winners at the Festival saw her crowned leading jockey.
The following month her profile reached stratospheric levels after she became the first woman to land the world's most famous steeplechase at Aintree aboard Minella Times.