The main reason for the rise in the number of families without children was the changes in the life-cycle of the family, as adult children become members of new families which they had established.
Glavni razlog za povečanje števila družin zakoncev brez otrok so spremembe v življenjskem ciklu družine, ko odrasli otroci z vzpostavitvijo lastne družine postanejo člani novih družin.