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【medical-news】口服避孕药并不增加癌症风险
Birth-Control Pill May Not Raise Risk of Cancer, Study Shows
By Trista Kelley
Sept. 12 (Bloomberg) -- Birth-control pills may not raise a woman's risk of getting cancer after all, a new study shows.
Oral contraceptives, known to increase the chance of some cancers in the short term, may cut the overall risk by as much as 12 percent later in life, according to research published today on the British Medical Journal's Web site. The scientists analyzed data from 46,000 women spanning a 36-year period. About half of them were on the pill.
More than 300 million women are thought to have taken oral contraception since its introduction in the early 1960s. The new study suggests the risk of cancer declines 15 years after women stop taking the medicine. Those who take the pill for more than eight years increase their chances of getting cancer.
``What we've tried to do is lump together all the cancers and look at the overall cancer risk among women over a sizeable chunk of their lifetime,'' Philip Hannaford, a professor at the University of Aberdeen who led the study, said in an interview. ``Very few studies have looked at the balance of many types of cancer. They tend to look at one cancer at a time.''
Earlier research has shown that birth-control pill users have an increased chance of cancer of the breast, cervix and liver while they take the contraceptive. Today's study shows, however, that the risks of breast and cervical cancers decline after oral contraception is stopped, and return to that of non- users within about 10 years.
The pill has also been known to reduce the risk of ovarian and endometrial cancers. The benefits for these cancers ``seem to persist for many years after stopping oral contraception, perhaps more than 15 years,'' the report said.
``The long-term cancer benefits might counter the short- term harmful ones if they persist into the age when most malignancies become common in women, 50 years or more,'' according to the researchers. Birth-Control Pill May Not Raise Risk of Cancer, Study Shows
研究显示，避孕药并不会增加罹患癌症的风险。
By Trista Kelley
作者Trista Kelley
Sept. 12 (Bloomberg) -- Birth-control pills may not raise a woman's risk of getting cancer after all, a new study shows.
9月12日（彭博）—— 一项新的研究显示，避孕药并不会增加妇女罹患癌症的风险
Oral contraceptives, known to increase the chance of some cancers in the short term, may cut the overall risk by as much as 12 percent later in life 部分内容的个人理解，请参阅！
Oral contraceptives, known to increase the chance of some cancers in the short term, may cut the overall risk by as much as 12 percent later in life, according to research published today on the British Medical Journal's Web site. ``The long-term cancer benefits might counter the short- term harmful ones if they persist into the age when most malignancies become common in women, 50 years or more,'' according to the researcher. 但是比较困惑，癌症的生存期怎么可能有50年啊。 [标签:content1][标签:content2]
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作者:admin@医学,生命科学 2011-06-03 05:11
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