By the beginning of the 20th century, improvement on mortality started rising in many countries and this has a direct impact on the results of actuarial calculus. The trend of mortality can be incorporated into actuarial calculus through the use of generation mortality tables, that consider not only the age x of the individual but also the time t. This study explores techniques to project the mortality and the improvement factors used to turn a mortality table into a generational one. The methodologies of Lee-Carter and generalized linear models were used to forecast mortality by using the England and Wales mortality experience of the past half century.