(NEWSER) – The California prison system had at least 148 women sterilized between 2006 and 2010—without the state signing off on the move. Another 100 women may have faced the same fate since the 1990s, the Center for Investigative Reporting finds, based on state records and interviews. The inmates were pregnant when they were registered for the procedure. State-contracted doctors conducted tubal ligations, the Center notes, and the doctors were paid $147,460 between 1997 and 2010. Ex-inmates say the women were pushed into it.