A family court judge who ruled that a pregnant woman with schizophrenia should undergo an abortion and be sterilized sharply defended her decision yesterday, while denouncing Boston University for withdrawing what she said was a job offer amid the controversy. In a rare personal defense of the reasoning behind a court ruling, Christina Harms, who retired from the bench last month after 23 years, said she concluded that the woman, a 31-year-old who suffered from delusions, would choose to terminate her pregnancy if she were mentally competent, chiefly so that she could resume antipsychotic medication that would have harmed the...