The authors followed up a pregnant woman with Addison's disease. Prior to, and throughout pregnancy, she received hydrocortisone in daily doses of 20 mg. The basic disease did not deteriorate during pregnancy. The pregnancy was terminated in the 41st week of gestation by induced labour. The infant's birth weight was below the 10th centile for the gestational age. Apgar score was 6. During the puerperium, the maternal basic disease got worse, requiring the increased substitution therapy. Both the mother and child discharged in good condition, on the 11th postpartal day.