The historic process of fertility decline was interrupted during the central decades of the 20th century with an unexpected period of increasing fertility that has been called the baby boom. Normally it is considered a phenomenon exclusive to countries participating in the historic demographic transition. A recent study suggests that a similar trend change in fertility may have also taken place in a few developing nations at approximately the same time and with similar characteristics to the fertility boom in the developed world. The main goal of this paper is to examine the extent to which these trend changes took place in Latin America and whether or not their characteristics were similar to those holding in the developed world.