Sterilzation

Should we force mothers that have killed their kids to be sterilized? Is it wrong to force this upon them? After all we force some sexual offenders that have severe sexual urges to take a medication, ( I forget what it is called ) to control their urges. Is this really so different to do this to those women? While I am on this subject, do we have the right to force a woman with severe postpartum psychosis to be sterilized to prevent them from getting pregnant again? Thus, possible preventing a tragedy. I am a big fan of Autonomy, yet I wonder should there be a line draw somewhere. I don't know the answer to these questions, Do you?