Study: No Abortion-Breast Cancer Link

No Extra Breast Cancer Risk In Women Who Have Abortions, 10-Year Study Finds

(WebMD)  There is no link between abortion and breast cancer, a 10-year study shows.

Researchers base the findings on a study in which they followed 105,716 women for 10 years. They found no link between abortion and breast cancers that occur before menopause.

Earlier large-scale studies showed no link between abortion and breast
cancers that occur after menopause.

"The globality of evidence supports no link between induced abortion and breast cancer," Harvard researcher Karin Michels, Sc.D., Ph.D., tells WebMD.

The Michels study shows a longstanding "scientific consensus," says
Michael Thun, M.D., vice president for epidemiology and surveillance research at the American Cancer Society in Atlanta. Thun was not involved in the Michels study.

"There is no evidence that having had an abortion increases the risk of
breast cancer," Thun tells WebMD. "This is a subject that has received
a lot of visibility; something that has been looked at repeatedly. There is strong scientific consensus this is the case."

Abortion and Breast Cancer Risk

At one time, researchers did suspect a link between abortion and breast
cancer. Researchers who asked women about their abortion history found that women with breast cancer were more likely than healthy women to report having had abortions.

But this kind of study — called a case/control study — is not considered particularly reliable. A person with a medical condition is more likely to report an unusual or embarrassing event than is a healthy person. That's particularly true when the event is an abortion.

"Abortion is such a personal and sensitive piece of information," Michel says. "If just you just ask random people, you get much more
underreporting then you do when you ask women with breast cancer, who are much more likely to reveal all sorts of information if you ask them."

Three studies that looked at women's records about abortion before
breast cancer developed found no link to breast cancer. Three studies that asked postmenopausal women about their abortion history and then observed them for long periods of time also found no link to breast cancer.

In 2003, the National Cancer Institute convened an expert panel to analyze these studies. It concluded that abortion did not affect breast cancer risk. Michels was a member of that panel.

"No study should be interpreted on its own," Michels warns. This current study really supports the consensus that we came up with in 2003. So now we can close the loop and say the lack of abortion risk seen for postmenopausal breast cancer applies to premenopausal breast cancer as well."

Despite the scientific consensus, four states have laws on the books that require doctors to warn women seeking abortion that the procedure may cause breast cancer. Those states are Minnesota, Mississippi, Montana, and Texas. The law in Montana has been found unconstitutional and is not enforced.

This year, there were efforts to introduce similar laws in New Hampshire, North Dakota, and Wyoming, according to the Center for Reproductive Rights. All of these bills failed to pass into law.

Thirty-one states have laws that require "biased counseling and/or
mandatory delays which may include providing information on breast cancer and abortion," a spokeswoman for Physicians for Reproductive Choice and Health tells WebMD.

The Michels study appears in the April 23 issue of Archives of Internal Medicine.

[briannorwood]

Geez! I'm surprised the Bush administration let this report get out. Their spin machine must be burning out.

Usually, these kinds of findings are either altered by some low-level putz to fit the agenda, or squashed outright.

[lfitts1]

If you are an anti-abortion nut--don't confuse me with the facts, my mind has been made up--if men got pregnant there would be no discussion about the right and availability of birth control and termination!!

[afmca]

To the anti-choice fruitcakes - ABORTION DOES NOT CAUSE BREAST CANCER ... to all the unqualified hypocritical politicians (especially in Montana, Mississippi, Montana, and Texas - ABORTION DOES NOT CAUSE BREAST CANCER ... to the right to life wingnuts that never have trouble spreading lies - ABORTION DOES NOT CAUSE BREAST CANCER ... to Texans (you're repeated becuase you have caused the world extreme pain by sending us Bush, Rove, Gonzales, DeLay) - ABORTION DOES NOT CAUSE BREAST CANCER ... to all Catholics who should be made to chant this refrain after each invocation this Sunday - ABORTION DOES NOT CAUSE BREAST CANCER ... the truth trumps religious zealotry and bigotry!

[mjhopkins1]

I guess if the FDA told us tomorrow that too much sun doesn't cause skin cancer, we'd all believe what we want to believe.
The warning to the mother who chooses abortion, is that she is killing (taking the life of another).period.

[afmca]

If the FDA told me tomorrow that too much sun does not cause skin cancer - FIRST I would DEFINITELY not believe them since this would be Bushitte medicine; SECOND I would check to see who just contributed huge amounts of money to the RNC as money is the only truth the Bushittes worship; THIRD I would look for independent medical confirmation - I would not go to the right wing; fruitcake web of medical lies. This information was presented as FACT in multiple states when in reality it is FICTION. If the anti-choice movement stoops to this lie that puts women's lives at risk what other lies do they push?

[oleander8]

Nice try, anti-choice lobby.