Focused on the constitutional statement that family planning has a non-coercive nature and it must be guided by preventive and educational actions respecting women's autonomy over their own bodies, this chapter investigates the origins of laws that based on eugenic methodologies spread the forced sterilization of people who were considered as “abnormal”, “undesirable” or “inferior” in the XX century. In addition, the research comprises the development of reproductive rights, in Brazil, during the last four decades, by observing: (i) the impact of a Parliamentary Commission of Inquiry which investigated complaints of mass sterilization of women during the 70s and 80s; (ii) the Family Planning Law (1996) and the Inclusion Law (2015) regarding the reproductive rights of people with disabilities; and (iii) the emblematic and condemnable “Janaína Case (2018) that determined the forced sterilization of a woman based on her situation of vulnerability, due to her addiction on drugs and alcohol.

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