PIP: Cuba's post-revolution demographic trends, especially in regard to fertility and emigration, and the causes and consequences of these trends, were examined using available statistical data. The authors maintain that both fertility and emigration trends were highly infuenced by economic factors. The trends are described in the context of the social and economic changes instituted by the revolutionary government. Government policies were aimed at 1) eradicating inequalities in housing, income, education, and health; 2) improving the status of women; and 3) upgrading the living standards of the rural population. Government policies did alleviate many social problems and greatly improved the health and educational status of the population; however, these policies had a marked adverse effect on economic performance. The demographic transition began in Cuba earlier than in most other developing countries and it began long before the 1959 revolution. These earlier changes must be taken into account when assessing the impact of post-revolution policies on demographic trends. Cuba's birthrate declined from 26-14.8/1000 population between 1959-1979 and the total fertility rate declined from 3.7-1.9 between 1970-1978; however, during the 1960s there was a baby boom and the birth rate for 1963 exceeded 35/1000 population. The baby boom was largely a response to the temporary improvement in economic conditions which occurred shortly after the revolution. The decline in fertility during the 1970s was due in part to the increased availability of abortion and contraceptive services and to a decline in the marriage rate; however, Cuba's deteriorating economy was also a major contributing factor. The baby boom of the 1960s is negativley affecting the current economy of the country. Individuals born during the baby boom are entering adulthood and are contributing toward Cuba's current unemployment problems. Prior to the revolution, Cuba experienced a high rate of in-migration. Immediately after the revolution this pattern was reversed and between 1959-1980 more than 800,000 Cubans emigrated. Most of these emigrants went to the U.S. A large proportion of the earlier emigrants were members of the upper and middle socioeconomic classes. Recent emigrants were more evenly representative of all segments of Cuba's population. The socioeconomic characteristics of the emigrants are described and their adjustment in the U.S. is discussed. Tables provide statistical data on Cuba's demographic trends.