The interactions between pregnancy and adult onset Still's disease (AOSD) are unclear. Between 1983 and 1990, 5 pregnancies occurred in 4 women with AOSD. AOSD occurred at the 5th and 6th month of the 1st pregnancy in 2 patients; a 2nd pregnancy occurring in one of them was not associated with a flare. In the other 2 patients pregnancy occurred 36 and 44 months after the AOSD; during gestation only transient arthralgia were observed in both cases. Pregnancy seems to have no effect on AOSD, and conversely, in our experience, AOSD has no influence on pregnancy, fetal growth or infant health.