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common_problems_in_abortion-breast_cancer_studies [2015/11/03 13:35]
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common_problems_in_abortion-breast_cancer_studies [2017/05/16 07:52] (current)
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-This entry draws heavily from [[http://​marri.us/​abortion-breast-cancer|Induced Abortion and Breast Cancer]].)) in analyses will obscure the influence of induced abortion on breast cancer risk. For example, the effect of induced abortion among nulliparous (or childless) women will be muted if nulliparous women with induced abortions are compared to nulliparous women with no induced abortions (never-pregnant women). The breast cancer risk of never-pregnant women is greater than that of parous women (or women who have born offspring); the risk associated with induced abortion will thus be muted.+This entry draws heavily from [[http://​marri.us/​research/​research-papers/​induced-abortion-and-breast-cancer/|Induced Abortion and Breast Cancer]].)) in analyses will obscure the influence of induced abortion on breast cancer risk. For example, the effect of induced abortion among nulliparous (or childless) women will be muted if nulliparous women with induced abortions are compared to nulliparous women with no induced abortions (never-pregnant women). The breast cancer risk of never-pregnant women is greater than that of parous women (or women who have born offspring); the risk associated with induced abortion will thus be muted.
  
 **__To avoid__**: Rather than disregarding the differences between women with different reproductive histories, advanced research should parse out their effects. Researchers ought to conduct sophisticated analyses and assess the effect of the timing of an induced abortion in a woman’s reproductive life (i.e., whether the induced abortion preceded or followed a first birth, if any, and the span of time between the abortion and any subsequent first birth). Researchers also ought to assess the influences of repeated induced abortions and maternal age and gestational period at induced abortion(s). **__To avoid__**: Rather than disregarding the differences between women with different reproductive histories, advanced research should parse out their effects. Researchers ought to conduct sophisticated analyses and assess the effect of the timing of an induced abortion in a woman’s reproductive life (i.e., whether the induced abortion preceded or followed a first birth, if any, and the span of time between the abortion and any subsequent first birth). Researchers also ought to assess the influences of repeated induced abortions and maternal age and gestational period at induced abortion(s).