Differences in coping style were assessed in a group of women undergoing amniocentesis and a control group not having the procedure. Subjects were divided into two groups according to coping style; "monitors" (information seekers) and "blunters" (information avoiders). In the amniocentesis group, coping style was associated with differences in mood state and change in mood state over time. "Monitors" experienced greater mood disturbance than "blunters" both before and during the procedure, but this effect disappeared after communication of amniocentesis results. Coping style was not associated with differences in maternal attitudes toward pregnancy or maternal-fetal attachment. In the control group, there were no differences between "monitors" and "blunters" on any of the mood state or pregnancy measures. Implications of these findings for providers of genetics services are discussed.