The book presents the basic concepts and indicators for studying marriage and marital behavior. It analyzes trends in the development of marriage in Bulgaria and in a comparative European context, reflecting the specific changes in fertility and family life that determine the marital and reproductive behavior of our population. General and age-specific marriage rates, specific and synthetic marriage rates, as well as seasonal variations in marriage rates from the beginning of the last century to the present day are calculated. Special attention is paid to first marriages. Their intensity in the country is assessed and data on the average age at first marriage from 1900 to 2007 are presented. Divorce rates in the country and in some European countries are analyzed, as well as the evolution of remarriages. Trends in marriage and divorce rates are presented on a regional basis. The dynamics of fertility and changes in the family model are traced, as well as their impact on the reproductive behavior of the Bulgarian population.