This trial might not even take place for a year, she won't be pregnant when she faces eventual trial.
They never execute anyone immediately. The child will be many years old in the unlikely scenario that any execution is ever carried out even if she is sentenced to death.
So assuming she's not pregnant at the trial and the baby is long gone am I supposed to believe that if she was pregnant at the time of arrest then that's it - the sentence is pre-determined due to her condition at the time of arrest?
She certainly wasn't pregnant when all these murders happened due to the amount of time which has elapsed, she may have been doing this for many years before being detected.