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A 2025 systematic review and meta-analysis combined 62 studies involving 43,860 people.
Overall, better couple-relationship quality was moderately associated with better sleep quality.
It was also associated with longer sleep duration.
Greater partner responsiveness—feeling that your partner understands and cares about you—was specifically associated with better sleep.
More partner conflict, meanwhile, was associated with poorer sleep.
The evidence doesn't mean a happy relationship automatically cures sleep problems.
But your romantic relationship doesn't necessarily switch off when you close your eyes at night.