Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


Breastfeeding reduces risk of breast cancer in women with a family history of the disease

According to a new study, women with a family history of breast cancer were 59 percent less likely to develop breast cancer themselves if they breastfed their children.

"This is good news for women with a family history of breast cancer," says Alison Stuebe, assistant professor of obstetrics and gynecology at the University of North Carolina at Chapel Hill School of Medicine and lead author of the study, which is published in the Aug. 10 issue of Archives of Internal Medicine.

"Our results suggest a woman can lower her risk of cancer simply by breastfeeding her children," Stuebe says.

Among women with a mother or sister with breast cancer, the researchers found that those who had breastfed were less than half as likely to develop premenopausal breast cancer as those who had not breastfed. The authors did not find a difference in risk among women without a family history of breast cancer.

For women with a family history, the reduction in risk with breastfeeding was similar to taking an anti-estrogen drug such as Tamoxifen for five years. But unlike Tamoxifen, Stuebe says, "Breastfeeding is good for mothers and for babies."

Stuebe and colleagues reviewed data from the Nurses' Health Study II, a long-term study of more than 100,000 women from 14 states. Stuebe's study followed more than 60,000 who reported at least one pregnancy in 1997, when breastfeeding was assessed in detail, and followed them through 2005 to determine how many developed invasive breast cancer.

How long a woman breastfed seemed to be less important than whether or not she had breastfed, Stuebe says. The reduction in risk was similar whether women breastfed for a lifetime total of three months or for more than three years. Also, there was no significant difference in risk for women who breastfed exclusively versus those who breastfed while supplementing with other foods.

Why breastfeeding reduces risk of breast cancer is unknown. The authors suspect that when women do not breastfeed, inflammation and engorgement shortly after birth causes changes in breast tissue that may increase risk for breast cancer. Breastfeeding followed by weaning may prevent this inflammation.

When the researchers compared data about women who breastfed and those who did not, there was a 25 percent total reduction in incidence of premenopausal breast cancer. But, Stuebe says, that statistic was accounted for by women without a family history of the disease.

"We did not find an association between breastfeeding and premenopausal breast cancer among women without a family history of breast cancer," Stuebe says. "This could be because there's something about genetically caused breast cancer that's affected by breastfeeding, or it could be because rates of breast cancer were so low in women without a family history that we couldn't see an association in this data set."

Stuebe says the research underscores the public health impact of policies that help mothers successfully breastfeed. In a recent CDC study, more than half of women said they stopped breastfeeding earlier than they wanted to. "Mothers and babies need supportive hospital policies, paid maternity leave, and workplace accommodations so that they can meet their breastfeeding goals," Stuebe says. "Public health begins with breastfeeding."

Clinton Colmenares | EurekAlert!
Further information:

More articles from Studies and Analyses:

nachricht Diagnoses: When Are Several Opinions Better Than One?
19.07.2016 | Max-Planck-Institut für Bildungsforschung

nachricht High in calories and low in nutrients when adolescents share pictures of food online
07.04.2016 | University of Gothenburg

All articles from Studies and Analyses >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Etching Microstructures with Lasers

Ultrafast lasers have introduced new possibilities in engraving ultrafine structures, and scientists are now also investigating how to use them to etch microstructures into thin glass. There are possible applications in analytics (lab on a chip) and especially in electronics and the consumer sector, where great interest has been shown.

This new method was born of a surprising phenomenon: irradiating glass in a particular way with an ultrafast laser has the effect of making the glass up to a...

Im Focus: Light-driven atomic rotations excite magnetic waves

Terahertz excitation of selected crystal vibrations leads to an effective magnetic field that drives coherent spin motion

Controlling functional properties by light is one of the grand goals in modern condensed matter physics and materials science. A new study now demonstrates how...

Im Focus: New 3-D wiring technique brings scalable quantum computers closer to reality

Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.

"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...

Im Focus: Scientists develop a semiconductor nanocomposite material that moves in response to light

In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.

A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...

Im Focus: Diamonds aren't forever: Sandia, Harvard team create first quantum computer bridge

By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.

"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...

All Focus news of the innovation-report >>>



Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

Agricultural Trade Developments and Potentials in Central Asia and the South Caucasus

14.10.2016 | Event News

World Health Summit – Day Three: A Call to Action

12.10.2016 | Event News

Latest News

Greater Range and Longer Lifetime

26.10.2016 | Power and Electrical Engineering

VDI presents International Bionic Award of the Schauenburg Foundation

26.10.2016 | Awards Funding

3-D-printed magnets

26.10.2016 | Power and Electrical Engineering

More VideoLinks >>>