This sounds like something that happened in Mississippi in the first half of the last century but no. It happened in California and it is ongoing. The motivation of the prison doctors is not clear nevertheless they performed 144 of tubal ligations. In 39 of those cases it was done without the women's consent. Time, of all publication reports;
A report released on Thursday by the California State Auditor examined 144 cases of tubal ligations (more commonly referred to as having one’s “tubes tied”) performed on imprisoned women over the course of eight years.
“Some of the inmates were sterilized unlawfully, and there were certain safeguards that were designed to limit those occurrences, and those failed,” Margarita Fernández, the auditor’s chief of public affairs, tells TIME.
Among the 144 cases, 39 sterilizations were performed without the inmate’s lawful consent. In another 27 cases, the inmate’s physician did not sign the form that confirmed two key components of consent: first, that the patient was mentally competent and understood the lasting effects of the procedure, and second, that the required waiting period had been satisfied.