In this paper we review recent literature on the link between child care and women's labor supply. The growing labor market participation of women has raised many concerns since it implies less time spent with the children and greater reliance on external forms of care. The studies on child care have focused on three important aspects which are likely to impact labor supply decisions: availability, costs and quality. Focusing on studies examining US, Canada and several European countries, we compare and discuss their methodologies and empirical results as well as their implications for child care policies. (author abstract)