Do older women lose their pubic hair?

Yes, as women age, the hair on their bodies (in all locations) normally thins and gets finer. The same is true for men. Hormones decreasing are a factor, but so is just age, and it can be entirely normal and expected.

Depending on how old, however, it may indicate some other conditions may be present, so it would be wise for it to be mentioned to their health care professionals to be sure there is no underlying problem, such as malnutrition or a thyroid disorder, that could be causing it prematurely.