CAMBRIDGE, Mass., April 24 (UPI) -- A study from Harvard University in Cambridge, Mass., has found no link between abortion and breast cancer.
The study followed more than 100,000 women from the Nurses Health Study for 10 years and also found no link between miscarriage and breast cancer, the Chicago Tribune reported.
A 2003 study by the National Cancer Institute also found terminating a pregnancy did not increase a woman's chance of developing breast cancer. But abortion opponents have maintained the link exists, and at least four states -- Texas, Mississippi, Minnesota and Kansas -- require women seeking an abortion be told that the procedure could cause breast cancer, the Tribune reported.
The national Coalition on Abortion/Breast Cancer said the Harvard study was flawed.
"These are the same researchers that told us in 1991 that by taking combined hormone replacement therapy women would be protected from heart attack and stroke," Karen Malec, president of the coalition, told the Tribune. "In this study, they are using the same study design and the same population base. They were wrong about HRT then, and they're wrong today about induced abortion."
The study appears in this week's issue of the Archives of Internal Medicine.