Due to difficult economic and religious circumstances in 17th century numerous serf families from Slovakia abandoned their homes and moved to southern parts of the former Hungarian empire. A larger portion of the migration flow arrived to the south-eastern Pannonic plain and to Vojvodina. The largest colonies of the Slovaks were settled in Banat, smaller ones in Bačka, while the Slovak colonies in Srem were the result of internal migrations from Bačka. By the 1960s, there was an increase in the Slovak population, then followed by the decrease, the most intensive in the last decade of the 20th century. The fluctuation in population number had repercussions in basic features of nuptiality in settlements where the Slovaks were majority, resulting in decrease in the number of nuptials and nuptiality rate.