We describe six pregnancies in five patients with Cushing's disease — four had undergone transsphenoidal surgery, with improvement but no cure of their hypercortisolism; the other woman became pregnant during initial work up. At conception, none of the patients were receiving specific treatment for hypercortisolism. Mean free urinary cortisol (FUC) prior to pregnancy was 430 nmol/24 h (normal range: 51–280). In two patients, FUC throughout pregnancy increased significantly, but no clinical progression was observed. FUC measured in 20 healthy pregnant women was found to rise above the normal non-pregnant range (
