<prompt> What accompanies sloughing of the endometrium during the endometrial cycle in a normal woman?An increase in progesteroneThe LH surgeA decrease in both progesterone and estrogenAn increase in estradiol  <response>: At the end of the luteal phase, the corpus luteum is resorbed and fails to produce progesterone and estradiol, making levels fall precipitously and causing the endometrium to slough. 