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Home Tips > Tips By Category > Tips you can implement daily In early pregnancy the level of estrogens increases, leading to breast growth in preparation for lactation. The abortion-breast cancer hypothesis proposes that if this process is interrupted with an abortion“ before full differentiation in the third trimester “ then more relatively vulnerable undifferentiated cells could be left than there were prior to the pregnancy, resulting in a greater potential risk of breast cancer.
The hypothesis, however, has not been scientifically verified, and abortion is not considered a breast cancer risk by any major cancer organization.
A large epidemiological study by Dr. Mads Melbye et al. in 1997, with data from two national registries in Denmark, reported the correlation to be negligible to non-existent after statistical adjustment.
The National Cancer Institute conducted an official workshop with numerous experts on the issue in February 2003, which concluded with its highest strength rating for the selected evidence it considered that "induced abortion is not associated with an increase in breast cancer risk."
In 2004, Beral et al. published a collaborative reanalysis of 53 epidemiological studies and concluded that abortion does "not increase a woman's risk of developing breast cancer."
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