Table 1.

Criteria for assigning reproductive stage

Stage no.DescriptionDefining criteria
Stage -3PremenopausalCV of length of current cycle + previous 5 (or fewer) cycles = <20%
Stage -2Early stage of menopausal transitionCV of length of current cycle + previous 5 (or fewer) cycles = 20-40%
Stage -1Late stage of menopausal transitionCV of length of current cycle + previous 5 (or fewer) cycles = >40% OR presence of a cycle length ≥ 60 d
Stage +1PostmenopausalNo menstruation for the previous 12 mo