The aim of this dissertation is to investigate the effects of discursive practices upon women-mothers over the ways of conceiving, giving birth and raising a child, considering the forms of social, cultural and linguistic construction implied in this process, which set apart the good mother from the bad. Taking into account, on the one hand, the increase in surgical-obstetric interventions, and on the other hand, the emergence of the Movement for the Humanization of Childbirth, we base ourselves on the theories of post-structuralists such as Michel Foucault, Gilles Deleuze, Félix Guattari, in order to question the institutionalized discourses about motherhood. From the discourses, made available on specialized sites, of 14 women-mothers on giving birth according to the precepts of humanized childbirth we seek to learn how discursive practices on motherhood and taking care of the baby, diffused in the process, articulate with the concrete experiences of these women in order to produce new subjective configurations. We mention 4 themes which configure primordial subjects: 1) Humanized childbirth, an alternative to the industrialization of childbirth, 2) Practices which produce desires, 3) Ideal childbirth: the woman as protagonist, 4) Ceasarean section: frustration and sadness when a naturally natural childbirth is desired. The narratives of these women show that adhesion to historically constructed thuths reaffirms myths and beliefs around the figure of the mother. In general, the prerrogatives of the Movement for Humanized Childbirth are also productive of desires and suffering, contributing to the feeling of inadequacy of women-mothers not in accordance with the instituted model.