Analyses of family life courses in Western Germany using data from the National Educational Panel Survey (NEPS) provide evidence that both postponement and the increasing diversity of union types cause destandardization in later life phases, and that this process is most pronounced during the phase in which individuals often start a family (i.e., in their early thirties). 
NEPS
Analyses of family life courses in Western Germany using data from the National Educational Panel Survey (NEPS) provide evidence that both postponement and the increasing diversity of union types cause destandardization in later life phases, and that this process is most pronounced during the phase in which individuals often start a family (i.e., in their early thirties). 
National Educational Panel Survey