An April 2009 study co-authored by a researcher who has previously denied an abortion-breast cancer link shows a statistically significant increase in breast cancer risk among women who have had abortions or who use oral contraceptives. The study by researchers including Jessica Dolle of the Fred Hutchinson Cancer Research contained a table reporting a statistically significant 40 percent risk increase for women who have had abortions. According to the Coalition on Abortion/Breast Cancer (CABC), the study listed abortion as among “known and suspected risk factors.”
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This was a very SMALL study. Looked at fewer than ONE THOUSAND breast-cancer patients.
Small studies are susceptible to statistical noise.
If you looked hard enough, you could find studies which say smoking tobacco PREVENTS lung cancer. More statistical noise.