RecruitingDevice studyAccelerated iTBS for Post Partum DepressionStudy 1: The investigators are studying the feasibility and tolerability of 10x/day intermittent theta burst (excitatory) transcranial magnetic stimulation to the left dorsolateral prefrontal cortex over the course of 6 days for women with post-partum depression. The investigators further aim to characterize the anticipated anti-depressant effect of this treatment paradigm. Study 2: The investigators are studying the feasibility and tolerability of 12 sessions/day of intermittent theta burse (excitatory) transcranial magnetic stimulation to the left dorsolateral prefrontal cortex over 5 days for women with post-partum depression. The investigators aim to compare the two different treatment schedules.