Answer: Endometrial biopsy
Step-by-step explanation:
The next best step in the management of this patient is endometrial biopsy. Endometrial biopsy is when a small piece of tissue is removed from the endometrium of the patient.
The removed tissue is then examined by the medical practitioner in order to determine any abnormalities in the cell and thereby form a diagnosis. This will be vital to get the necessary information that'll be used in taking care of the patient.