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With maternal serum alpha-fetoprotein testing, large numbers of previously "low-risk" patients are now considered high risk and are offered genetic testing. Anecdotally, these patients have been perceived as more highly anxious than other second-trimester patients referred for genetic testing because of advanced maternal age. Thus we have studied patient demographics, true genetic risks, the perceptions of risk, and state (situational) and trait (constitutional) anxiety for these patients and their partners. Significantly increased state anxiety was noted for mothers as compared with fathers both in the group of women referred for testing because of maternal serum alpha-fetoprotein levels and in those referred due to advanced maternal age. State anxiety was increased in the women referred for maternal serum alpha-fetoprotein levels as compared with women referred for advanced maternal age. True genetic risks were comparable between the groups. Some critics have argued that maternal serum alpha-fetoprotein screening engenders unnecessary anxiety. Our data show that patients undergoing genetic testing due to maternal serum alpha-fetoprotein levels have higher state anxiety than women undergoing testing because of advanced maternal age, but that indication is much less a factor than are partner differences. Therefore, increased anxiety after abnormal maternal serum alpha-fetoprotein testing results cannot be reasonably used as an argument against such testing.