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Women who recently used birth control pills containing high-dose estrogen and a few other formulations had an increased risk for breast cancer, whereas women using some other formulations did not, according to data published in Cancer Research, a journal of the American Association for Cancer Research.
"Our results suggest that use of contemporary oral contraceptives [birth control pills] in the past year is associated with an increased breast cancer risk relative to never or former oral contraceptive use, and that this risk may vary by oral contraceptive formulation," said Elisabeth F. Beaber, PhD, MPH, a staff scientist in the Public Health Sciences Division of Fred Hutchinson Cancer Research Center in Seattle, Washington.
"Our results require confirmation and should be interpreted cautiously," added Beaber. "Breast cancer is rare among young women and there are numerous established health benefits associated with oral contraceptive use that must be considered. In addition, prior studies suggest that the increased risk associated with recent oral contraceptive use declines after stopping oral contraceptives."
In a nested case-control study of 1,102 women diagnosed with breast cancer and 21,952 controls, Beaber and colleagues found that recent oral contraceptive use increased breast cancer risk by 50 percent, compared with never or former use. All study participants were at Group Health Cooperative in the Seattle-Puget Sound area. Patients received a cancer diagnosis between 1990 and 2009.
Birth control pills containing high-dose estrogen increased breast cancer risk 2.7-fold, and those containing moderate-dose estrogen increased the risk 1.6-fold. Pills containing ethynodiol diacetate increased the risk 2.6-fold, and triphasic combination pills containing an average of 0.75 milligrams of norethindrone increased the risk 3.1-fold.
originally posted by: rickymouse
a reply to: knoledgeispower
It is only supposed to effect one in a hundred. I guess that is acceptable to them. But is it acceptable to the people who get breast cancer. I think there are a lot of people on these pills and that equates to ten in a thousand. Say there are five thousand in the UP that take them, that is a fifty people with cancer. That does not sound very acceptable to me. This should be stated to every woman that is prescribed the pill and the doctor should not be able to say that this number is small. I have been told by doctors that side effects are rare, but I have experienced them. I also see a lot of other people experiencing side effects yet the doctors tell people they will get used to the meds. So you get used to being doped up or sicker than what you came to the doctor for in the first place.