Don’t know this lady’s story. But post natal psychosis is a real tragic thing that can happen. This isnt the action of someone possessing their faculties.
Why when abortion is available would you carry to term -and then so impulsively act? If for whatever reason she didn’t want the baby and couldn’t get the abortion, she had months to come up with a better plan than ‘throw it out a window’. Either she was undiagnosed with something the whole time, or the birth triggered a psychological episode imo.