The data set contains information about births in Lithuania from 2021. The object of the kit is single or multiple birth. The data are collected from statistical forms Pregnancy and Dead Cards No. 2016-10-07_Nr_V-1149_forma +010-2-1a and Pregnancy and Dead Cards No. 2016-10-07_Nr_V-1149_forma +010-1-1a. Information on date of birth, maternal area, place of birth, total number of fruit at birth and maternal RhD antigen shall be provided.