the process of ovulation and menstration in people with a uterus
Seasonal Affective Disorder (SAD)
depression associated with late autumn and winter and thought to be caused by a lack of light
Reinberg
found that when women were exposed to brightlight in the evening, their menstrual cycles became shorter
Roenneberg et al
found that women who were more exposed to more naturallight had menstrual cycle more closely aligned to the lunar cycle
Termal et al
found that brightlight in the morning, when melatonin levels are low, was more effective in reducing symptoms of SAD than bright light in the evening, when melatonin levels are high
