02/24/2026
How Hormones Affect Sleep
Sleep is not just about melatonin. It’s influenced by:
• Progesterone – promotes calm and deep sleep
• Estrogen – supports serotonin and temperature regulation
• Testosterone – affects sleep quality and recovery
• Cortisol – your stress hormone (often elevated at night)
When these hormones fluctuate or decline, insomnia often follows.