“…In females between the ages of 40 and 65 years, when estrogen secretion decreases, menopause does not occur temporarily at one specific time; instead, over a considerable period of time, hormones fluctuate and the menstrual cycle becomes irregular along with various physical and psychological changes, occurring through TA B L E 1 (Continued) a transitional period (Lobo et al, 2000). Middle-aged females in this period often experience sleep-related problems due to physiological changes (Lee et al, 2019;Morssinkhof et al, 2020), and these sleeprelated problems have been shown to be related to depression in several studies (Lee et al, 2022;Morssinkhof et al, 2020;Terauchi et al, 2012).…”