Menopause Society Practice Exam

During perimenopause, the ovaries become erratic and estrogen levels fluctuate, so ovulatory cycles become unpredictable and the endometrium sheds irregularly. This leads to irregular bleeding in both timing and flow. At the same time, instability in the hypothalamic–pituitary–ovarian axis and estrogen withdrawal produce vasomotor symptoms such as hot flashes and night sweats. The combination of irregular bleeding with vasomotor symptoms best reflects LOOP events in this phase, because it ties together the endometrial instability with the central temperature-regulation changes typical of this transition. Regular bleeding with steady vasomotor symptoms suggests more stable cycling, heavy bleeding without vasomotor symptoms is less typical for the common perimenopausal pattern, and no bleeding with no symptoms points away from the perimenopausal experience.