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Progestin
REM Periods
Stages of sleep characterized by rapid eye movement, low muscle tone, and the propensity to dream.
Night
The period of darkness between sunset and sunrise during which there is a absence of visible sunlight.
Slow-Wave Sleep
The deepest phase of non-REM sleep, characterized by slow brain waves and associated with deep physical relaxation and restoration.
Sleep Stages
The different phases of sleep that cycle throughout the night, including Rapid Eye Movement (REM) and various stages of non-REM sleep, each characterized by distinct brain waves and physiological responses.
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