The aim of this paper is to compare the demographic behavior for different selected localities in the Czech lands in the 18th century and to compare one of those selected localities, which was formed of higher share of German inhabitants, with the similar one locality in Germany. In all these localities the data were obtained by the family reconstitution method based on parish registers.
The study is based above all on the usage of Survival analysis and Cox regression. According to results, the average length of the birth intervals in all the studied localities in Czech lands is longer in comparison to those German villages where breastfeeding was not common and nearly similar to the length observed in the German villages where breastfeeding was a general practice.
The average birth intervals in all the Czech localities were around 30 months if the previous child survived the 1st year of life.