The aim of this paper is to analyse the changes in the determinants of the decision to participate in the labour market, union formation and non-maternity. We use the European Union Statistics on Income and Living Conditions Survey (2005-2011). The econometric technique is a trivariate probit model, which allows estimating the three dependent variables simultaneously. The results show, among other things, that highly educated women are more likely to participate in the labour market and not to have children and less likely to live in a couple.