Description: This paper suggests that research is needed with better instruments to determine the maximum longevity in Mexico and the trend of life expectancies at all ages. This is essential if we want to know what the future might be, especially the near future, as it has been show by actuarial, economic, and social problems in pensions, and health-care schemes. From 2005 Living to 100 and Beyond Monograph, M-LI05-1.