Four hundred eighty-four patients undergoing mammography and 498 patients visiting their obstetrician-gynecologist were asked whether they would take a breast cancer 1 (BRCA1) test to detect a genetic susceptibility to breast cancer. More than 90% in both groups said they would take the test. Women were more likely to accept if they were regularly having breast examinations by a physician, believed that mammography effectively detects early breast cancer, and believed that early breast cancer is curable. If shown to have inherited a susceptibility, many reported that they would be very anxious, would want the test repeated, would examine their breasts more often than monthly, and would want mammography more often than yearly. Many also reported that they would recommend testing to relatives.