HOME >> MEDICINE >> NEWS
Oral contraceptives increase risk for breast cancer in some women, meta-analysis finds

ROCHESTER, Minn. -- A meta-analysis published in the October issue of Mayo Clinic Proceedings indicts oral contraceptives as putting premenopausal women at significantly increased risk for breast cancer, especially women who use them prior to having a child.

The meta-analysis builds on many studies with similar findings. But even as the findings stack up, many women are unaware of the risks posed by oral contraceptive use prior to pregnancy, says lead study author Chris Kahlenborn, M.D., of Altoona Hospital in Altoona, Pa.

Dr. Kahlenborn says the discrepancy between risk and patient awareness prompted the meta-analysis, which involved extracting data from 34 studies on whether oral contraceptive (OC) use is associated with premenopausal breast cancer. Included in the studies were women who were premenopausal or younger than 50 and who had been, in most cases, diagnosed with breast cancer during or after 1980.

"As I studied the medical literature, I noticed that a trend appeared," says Dr. Kahlenborn. "Namely, OC use prior to first-term pregnancy seemed to consistently increase the risk of premenopausal breast cancer. Although the trend was apparent, premenopausal women have continued to hear that OCs are basically safe."

Rather, patients should know that sustained oral contraceptive use prior to pregnancy increases a premenopausal woman's risk of developing breast cancer, saysDr. Kahlenborn. He says physicians should better inform their patients of the risks associated with oral contraceptives and calls it a "clear-cut informed consent issue."

The study noted that 21 out of 23 retrospective studies have shown an increased risk of breast cancer in women who took oral contraceptives prior to pregnancy. It also showed that those women experienced an increased risk of 44 percent.

What's more, in 2005, the World Health Organization officially classified oral contraceptives as a class one carcinogen, the study
'"/>

Contact: John Murphy
newsbureau@mayo.edu
507-284-5005
Mayo Clinic
30-Oct-2006


Page: 1 2

Related medicine news :

1. Study demonstrates safety of oral contraceptives in women with lupus
2. VCU study: Low-dose oral contraceptives may increase risk for heart attack or stroke
3. Traditional Chinese exercises may increase efficacy of flu vaccine
4. Smoking may strongly increase long-term risk of eye disease
5. Diets high in choline may increase risk for colorectal polyps
6. Chemotherapy with bevacizumab increases risk of blood clots in arteries
7. Low hospital staff levels increase infection rates
8. Reduced greenhouse gas emissions required to avoid dangerous increases in heat stress
9. How to market diet pills: Prescription and over-the-counter pills may increase unhealthy behavior
10. Study outlines how stroke, head injury can increase risk of Alzheimers disease
11. Antipsychotic drugs increase risk of death in older people with dementia

Post Your Comments:
(Date:7/6/2015)... Grove, Utah (PRWEB) , ... July 06, 2015 , ... ... Kirk Jowers to its executive management team. Most recently, Jowers held the position as ... for ten years. , After spending a decade building the institute, Jowers states that ...
(Date:7/6/2015)... ... , ... Seedstock today announced Pierre Sleiman, founder and CEO of Go ... Agriculture Conference – “Innovation and the Small Farmer” – to be held Nov. 3-4 ... Diego, will explore solutions and methodologies that small farmers and entrepreneurs are developing to ...
(Date:7/6/2015)... ... July 06, 2015 , ... MD Now, the leading and fastest-growing urgent care ... urgent care center will serve residents and visitors in the Cutler Bay area, giving ... 22nd South Florida location, the new facility will be the fourth to serve Miami-Dade ...
(Date:7/6/2015)... ... July 06, 2015 , ... The School ... funds to support a three-year effort to reduce rates of diabetes and cardiovascular ... in partnership with the Morehouse School of Medicine’s Prevention Research Center and the ...
(Date:7/6/2015)... ... July 06, 2015 , ... Promero, a leading cloud hosting ... Unified IP contact center solution hosted by Promero. Randstad Technologies,a leading talent ... future call center platform. , Promero will implement and manage the private ...
Breaking Medicine News(10 mins):Health News:doTERRA Welcomes Kirk Jowers to Its Executive Team 2Health News:doTERRA Welcomes Kirk Jowers to Its Executive Team 3Health News:doTERRA Welcomes Kirk Jowers to Its Executive Team 4Health News:Seedstock Names Go Green Agriculture Founder and CEO as 2015 Sustainable Agriculture Conference Keynote Speaker 2Health News:Seedstock Names Go Green Agriculture Founder and CEO as 2015 Sustainable Agriculture Conference Keynote Speaker 3Health News:Seedstock Names Go Green Agriculture Founder and CEO as 2015 Sustainable Agriculture Conference Keynote Speaker 4Health News:MD Now Urgent Care Opens its Fourth Miami-Dade County Facility in Cutler Bay 2Health News:MD Now Urgent Care Opens its Fourth Miami-Dade County Facility in Cutler Bay 3Health News:Georgia State, Morehouse Partner To Tackle Diabetes, Heart Disease In Atlanta’s Minority Communities 2Health News:Aspect Software Unified IP, Hosted by Promero, Selected by Randstad Technologies 2Health News:Aspect Software Unified IP, Hosted by Promero, Selected by Randstad Technologies 3
(Date:7/6/2015)... 2015 Increase in R&D ... market in Germany through 2020 ... Research report, " Germany Bioinformatics Market Forecast & Opportunities, ... is projected to register a CAGR of over ... tremendous growth on account of rising government funding and ...
(Date:7/6/2015)... 29, 2015 Research and ... "Pharmaceutical Packaging Market in North America 2015-2019" ... market in North America to ... 2014-2019. International regulations regarding safe drug ... which in turn fuels adoption of sustainable packaging. Various ...
(Date:7/6/2015)... 6, 2015 Cardinal Health today announced the ... (THDG). A distributor of generic pharmaceuticals, over-the-counter medications and related ... was owned by Court Square Capital Partners. The $1.115 ... and new debt.  Headquartered in ... had revenues of approximately $450 million in 2014. There ...
Breaking Medicine Technology:Germany Bioinformatics Market to Grow at a CAGR Over 29% Through 2020 Says TechSci Research 2Germany Bioinformatics Market to Grow at a CAGR Over 29% Through 2020 Says TechSci Research 3North American Pharmaceutical Packaging Market 2015-2019 with Amcor, Bemis Healthcare Packaging, MeadWestvaco, Owens-Illinois & West Pharmaceutical Services Dominating 2North American Pharmaceutical Packaging Market 2015-2019 with Amcor, Bemis Healthcare Packaging, MeadWestvaco, Owens-Illinois & West Pharmaceutical Services Dominating 3Cardinal Health Completes Acquisition Of The Harvard Drug Group For $1.115 Billion 2Cardinal Health Completes Acquisition Of The Harvard Drug Group For $1.115 Billion 3
Cached News: