A mail-order bride is a woman who lists herself in catalogs and is selected by a man for marriage. In the twentieth century, the trend was primarily towards women living in developing countries seeking men in more developed nations. In the twenty-first century, the trend is now based primarily on internet-based meeting places which do not per se qualify as mail-order bride services. The majority of the women listed in the twentieth-century and twenty-first-century services are from Southeast Asia, countries of the former Eastern Bloc and (to a lesser extent) from Latin America. Since the collapse of the Soviet Union, large numbers of eastern European women have advertised themselves in such a way, primarily from Russia, Belarus, Ukraine, and Moldova. Men who list themselves in such publications are referred to as "mail-order husbands", although this is much less common.