There have been exhaustive studies evaluating the benefits of routine screening mammography. Note this is routine screening, not a woman with a lump or another reason to suspect breast cancer.

Greger has summarized the results:

One woman in 1000 will have her life saved by screening mammography.

Total death rate is the same in screened and unscreened, presumably since unnecessary treatment for non-fatal breast cancer or benign breast disease has led to the death of one in a thousand women.

Screening for breast cancer is a huge business with many powerful interests profiting. Screening guidelines are controlled by these special interest groups. A non-profit consortium of international experts has recommended against routine screening with either mammography or self examination.

Your American physician is told by the federal government to recommend screening with mammography.

An important consideration is peace of mind. If a woman is anxious and feels reassured if she has screening mammography, then she should probably do it.