Study of the social differences in wishes, expectations and behaviour of married women regarding contraception and family planning, with special attention for the planning in the spread of births and its effect on final family size. Marriage / birth pattern / pregnancy / still birth / contraception methods / expected number of children / attitude towards abortion / pre-marriage relation with husband / influence of marriage, children on wives having a job / family size preferred / family planning / birth control / sterilization / socio-economic situation at the time of marriage / housing and moving / fertility. Background variables: basic characteristics/ residence/ household characteristics/ characteristics of parental family/household/ occupation/employment/ education/ social class/ religion