Hi there, thanks for asking. It can be true. It depends on when that glioma has happened and what is the reason for. Left frontal lobe lesions as you mentioned can cause depression. However, it is treatable and your depression will respond to medication or psychotherapy. Your hemoglubin is also in the lower normal and borderline limit which can cause fatigue. Post natal depression is very important to be paid attention otherwise it can become chronic or repeated in the next pregnancies. i wish you a good health.