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 Presented in Chronological Order  Please click on links below to view the PDF (printer friendly) files of each Fact Sheet. A PDF file of the entire paper (pages 1-133) can be read or downloaded by visiting our Publications page. ​ 
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Epidemiologic Studies
​Updated April 2020
​These studies differentiate induced and spontaneous abortions.
​Epidemiological Studies - Induced Abortion and Breast Cancer Risk
Citizen Petition from Contraceptive Study Group
​The FDA accepted the petition on October 30, 2019. 

Hormonal contraceptives have been on the market for over 50 years and, while their formulations have changed, the basic mechanism of action has remained the same. During this time numerous studies have been performed documenting side effects, some of which appear over time, some within weeks or months, but all can have a serious impact on health. An effort was made to perform a series of comprehensive literature surveys to better understand immediate and long-term side effects of these agents. The results of this literature review have led to several recommendations. 

Click here to read/add your comments online. 
Petition on Hormonal Contraceptives (pdf)
​Breast Cancer and Induced Abortion
A comprehensive review of breast development and pathophysiology, the epidemiologic literature, and proposal for creation of databanks to elucidate all breast cancer risk factors.
Angela E. Lanfranchi, MD, FACS, and Patrick Fagan, PhD.
Issues in Law & Medicine. V29, N1:3-133. Spring 2014.
  1. Introduction - Induced Abortion Increases Breast Cancer Risk

  2. Developmental Biology - Breast development

  3. Developmental Biology - Breast cancer formation
​
  4. Developmental Biology - Changes during pregnancy and breastfeeding

  5. Developmental Biology - Miscarriage, premature delivery, and breast cancer risk 

  6. Developmental Biology - Induced abortion and breast cancer risk
​
  7. Developmental Biology - Full‑term pregnancy and breast cancer protection

  8. Developmental Biology - Summary of breast cancer risks and protections…

*Taken with permission from ISSUES IN LAW & MEDICINE, “Breast Cancer and Induced Abortion: A Comprehensive Review of Breast Development and Pathophysiology, the Epidemiologic Literature, and Proposal for Creation of Databanks to Elucidate All Breast Cancer Risk Factors,” Vol. 29, No. 1, Spring 2014.
Factors Which Increase and Decrease Breast Cancer Risk
October 2011
Factors Which Increase and Decrease Breast Cancer Risk - English Version
Factors Which Increase and Decrease Breast Cancer Risk - Spanish Version
The Biologic Cause of the Abortion Breast Cancer Link
May 2004 (revised)
The Biologic Cause of the Abortion Breast Cancer Link - The Physiology of the Breast
Recall Bias: An Argument Used Against the Abortion Breast Cancer Link
May 2003 ​
Recall Bias - An Argument Used Against the Abortion Breast Cancer Link
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​*To read more information on breast cancer risks and prevention, please view our Publications Page and  Resources Page. 
Breast Cancer Prevention Institute 
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