Résumé : In this paper, we aim to study the impact of the presence of young children in the home on mother's and father's employment patterns. The results show that motherhood has an important and negative impact on labour market participation both in terms of part-time and inactivity and the child effect decreases with the age of the youngest child. As far as men are concerned, regression results show that the link between fatherhood and men's hours worked tends to be reversed in comparison with women (fathers work more hours than their childless counterparts) and suggest that men assume their good-provider role.