Biological Clock

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The term "biological clock" may refer to:

• Age and female fertility, decrease of female fertility with advancing maternal age
• Ageing, biological program that limits the lifespan of an individual
• Circadian clock, a molecular mechanism that results in a circadian rhythm in a living organism
• Circadian rhythm, biological process that displays an oscillation about 24 hours, such as the human sleep-wake cycle (the "body clock")

Targeting the biological clock could slow the progression of cancer