Jockey Lorna Brooke is in a “serious but stable” condition in hospital following her fall at Taunton on Thursday.
The amateur rider was airlifted to Southmead Hospital in Bristol after falling from Orchestrated in the Pontispool Equine Sports Centre Handicap Chase.
The incident happened at the third fence, when the horse trained by her mother Lady Susan Brooke was racing in mid-division.
On-course medics were on hand to provide treatment, before the air ambulance was sent to the Somerset venue.
On Friday, the Injured Jockeys’ Fund issued a statement on behalf of her family, which said: “Amateur jockey Lorna Brooke is in Southmead Hospital in Bristol after suffering a fall at Taunton Racecourse yesterday.
“She is in intensive care in a serious but stable condition and is conscious. She is undergoing observations and tests for a suspected spinal injury.
“Her parents Sir Alistair and Lady Susan Brooke kindly ask for privacy at this difficult time.”
Brooke, who rides with a 7lb claim, has competed in more than 400 races since 2000.
Her 17 winners in Britain and Ireland include the inaugural running of the Today FM Ladies Handicap Chase at Fairyhouse in 2015.
Taunton’s final race on the card was delayed by an hour to allow the aircraft to land and Brooke to be taken to hospital.