This article examines the extent to which childbearing behavior is determined by mothers' preferences versus individuals' own preferences. The theoretical framework is based on socialization and social control. A total of 835 mother-child pairs from the Intergenerational Panel Study of Parents and Children, a long-term longitudinal study, are analyzed using hazard models. The empirical analyses show that both sons and daughters whose mothers prefer early marriage, large families, low levels of education, and stay-at-home mothers enter parenthood earlier than their peers, and analyses show support for both socialization and social control mechanisms. The study concludes that mothers' preferences have a strong influence on when their children become parents by guiding them on different pathways toward adulthood.