“…Earlier analyses of the FS have identified three dimensions of values of children, labelled as 'children as meaning of life', 'children as burden' and 'children as utility' (Bertram 1991(Bertram , 1992. A related study of Bavarian women found four factors, dividing the 'burden' into the 'material, psychic and social costs of children' and 'opportunity costs of children' (Nauck 1993).…”