A 31-year-old woman comes to the physician for a routine health maintenance examination. For the past year, her menstrual periods have ranged between 21 and 55 days in length. Her last menstrual period was two weeks ago. BMI is 29. Which of the following is most likely to be seen in this patient?
Decreased corpus luteum secretion of human chorionic gonadotropin
Decreased syncytiotrophoblastic secretion of progesterone
Decreased follicular phase progesterone
Increased serum follicle-stimulating hormone
Proliferative endometrium
