During sleep, the body goes through multiple sleep cycles. Each cycle consists of four stages: three stages of non-rapid eye movement (non-REM) sleep and one stage of rapid eye movement (REM) sleep. A ...
What some call the dozing off stage, the first sleep stage marks the transition from wakefulness to sleep. It typically happens over a few minutes, per the National Sleep Foundation, and it initiates ...
Verywell Health on MSN
What Are the 4 Stages of the Hair Growth Cycle?
Your hair grows in a cycle of four stages or phases. The stages are anagen (growth stage), catagen (regression stage), ...
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