Conundrums of Diagnosis and Management of Cushing's Syndrome in Pregnancy.

Pregnancy is rare in women with Cushing's syndrome (CS), due to hypercortisolism-induced gonadotropin suppression and anovulation. Diagnosis of CS is hampered by physiological cortisol level increases during normal pregnancy; importantly abnormal cortisol secretion circadian rhythm could be diagnostic. Active CS is associated with considerable maternal and fetal complications. Second trimester surgery (pituitary or adrenal) is the main treatment option, however observation in mild cases has been suggested. Medical treatment, although not approved for use in pregnancy, may be considered, after careful discussion and balancing any benefits with potential risks and side-effects.