If one has an adrenal tumor secreting testosterone, would the testosterone secreted by it reduce in the body post an abortion for a temporary period?

No: An adrenal coritical tumor continues to produce hormones unless suppressed by known agents.If the tumor is small it is probably benign but if it grows there is a chance it can be malignant and surgical removal is necessary In any case a hormorme producing lesion can easily be resected thru the bed of the 12th rib Hormone secretion will not lessen post abortion