Over 25% of the respondents to the questionnaire exhibited confusion about the wording, where the unfamiliar term "spontaneous abortion" was used to mean "miscarriage". <ref>Study, p. 815.</ref> Miscarriages do not increase breast cancer risk, and this deceptive word choice would cause many respondents to mark their prior abortions as "spontaneous abortion" or miscarriage. That would reduce any genuine differences between induced abortion and miscarriages in the observed results. | Over 25% of the respondents to the questionnaire exhibited confusion about the wording, where the unfamiliar term "spontaneous abortion" was used to mean "miscarriage". <ref>Study, p. 815.</ref> Miscarriages do not increase breast cancer risk, and this deceptive word choice would cause many respondents to mark their prior abortions as "spontaneous abortion" or miscarriage. That would reduce any genuine differences between induced abortion and miscarriages in the observed results. |