International Journal of Endocrinology / 2010 / Article / Fig 3

Review Article

Sleep, Hormones, and Circadian Rhythms throughout the Menstrual Cycle in Healthy Women and Women with Premenstrual Dysphoric Disorder

Figure 3

The relationship between melatonin secretion, body temperature and sleepiness. The onset of melatonin secretion during the early night causes an increase in heat loss at the extremities (i.e., rising distal skin temperature, and distal-proximal temperature gradient) and a drop in core body temperature, followed by an increase in sleepiness. From [21].

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