Different epidemiological studies have indicated conflicting information about the association of induced abortion IA with breast cancer risk. A recent meta-analysis with prospective evidences did not support the positive association between IA and breast cancer risk. Thus, we in our meta-analysis study have tried to analyze this specific association. We searched all relevant articles from an English-language literature using Pubmed, Embase, and Cochrane databases, until December 10, All the statistical analyses were performed on case—control studies, using Review Manager Software 5.
The abortion—breast cancer hypothesis posits that having an induced abortion can increase the risk of getting breast cancer. This hypothesis is at odds with mainstream scientific opinion and is rejected by major medical professional organizations. In early pregnancy , hormone levels increase, leading to breast growth. The hypothesis proposes that if this process is altered by an abortion, then more immature cells could be left behind, and that these immature cells could increase the risk of breast cancer over time.
Abortion, Miscarriage, and Breast Cancer Risk: 2003 Workshop
One prominent paid-for advertisement from a group calling itself Good Counsel Network Ireland has been surfacing on Irish Facebook user news feeds. The status on the video post, in essence, claims that having an abortion leaves a woman at increased risk of developing breast cancer. Source: Facebook. The post does not cite a source for this claim and attempts to contact Good Counsel Network Ireland to expand on this have been unsuccessful.
Early studies of breast cancer raised substantial concern regarding risk associated with induced abortion and miscarriage. Literature reviews suggest that study findings depend heavily on the comparison group and that the use of parous women as a reference group for nulliparous women may artificially inflate risk. In-person interviews were conducted to obtain a detailed reproductive history. Risk estimates were obtained by conditional logistic regression using nulligravid women as the reference group for nulliparous women with a history of incomplete pregnancy and parous women with no incomplete pregnancies as the reference group for parous women with a history of incomplete pregnancy.