Effect of gestational exposure to dim light at night on the behavior of rat dams and offspring

Jul 28, 2025Scientific reports

Effects of dim light at night during pregnancy on the behavior of mother rats and their babies

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Abstract

Prenatal exposure to (dLAN) of approximately 2 lux may lead to behavioral changes in offspring.

  • Male offspring showed decreased locomotor activity in anxiety assessments.
  • Social interaction latency was altered in male offspring exposed to dLAN.
  • Adult males exposed to dLAN tended to exhibit less immobility in a test for depressive behavior.
  • Female offspring displayed increased activity in open environments, indicating potential higher exploratory behavior.
  • Behavioral effects varied depending on the age and sex of the offspring.

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Key numbers

17×
Decrease in locomotor activity
Locomotor activity in males during elevated plus maze test compared to controls.
9.71 ± 0.29
Litter size trend
Average litter size in vs. control groups.

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