Elizabeth Rose, 25, from Kent, is due to face a bone marrow transplant and chemotherapy - something which she fears will render her infertile.
The artist is now seeking an 'exceptionally urgent' judicial review so that she may have a chance of having children one day.
One theory is that Crohn's disease is caused by the immune system attacking healthy bacteria in the gut, so by giving the patient a new immune system, the disease may be cured.
According to Miss Rose's lawyer, she has been continuously refused the funding to have her eggs frozen before the treatment.
He said: 'The expected consequence if the fertility preservation treatment is not provided is lifelong infertility and the inability to bear her own genetic child.'
The syndrome causes inflammation of the lining of the digestive system and there is no cure currently.