Review Question - QID 213436

A 37-year-old G2P1 woman presents to the clinic complaining of amenorrhea. She reports that she has not had a period for 2 months. A urine pregnancy test that she performed yesterday was negative. She is sexually active with her husband and uses regular contraception. Her past medical history is significant for diabetes and a dilation and curettage procedure 4 months ago for an unviable pregnancy. She denies any discharge, abnormal odor, abnormal bleeding, dysmenorrhea, or pain but endorses a 10-pound intentional weight loss over the past 3 months. A pelvic examination is unremarkable. What is the most likely explanation for this patient’s presentation?