FCOG-1031

A 61-year-old woman presents to OBGYN clinic with a complaint of irregular bleeding per vagina for the last 3 months. Her past medical history is not significant and she went through menopause around a decade ago.
A cervical screening test is performed and comes back normal. PCR for chlamydia is also negative. Endometrial thickness of around 8mm is seen on transvaginal ultrasound.
What would be the next step of management?