The mean age of women at childbirth is the mean age of women when their children are born (not only the first one). The mean age of women at birth of first child is the mean age of women when their first child is born (live birth).

Mean number of children that a woman could have during her childbearing age, unter Berücksichtigung der aktuellen durchschnittlichen Anzahl lebend geborener Kinder in verschiedenen Altersgruppen.