What exactly should a woman do at age 40? Should she get screened or not? How should she decide?

The risk of breast cancer is lower in women between the ages of 40 to 44. Still, some women will choose to accept the greater chance of a false-positive finding and the harms that could come from that (biopsy pain and anxiety, for instance) as a reasonable tradeoff for potentially finding cancer. The decision about whether to begin screening before age 45 is one that a woman should make with her health care provider.