Short-term and long-term effects of outdoor artificial light at night on reproductive hormones among infertile women from a preconception cohort study

Key Points

• Outdoor artificial light exposure is linked to changes in reproductive hormones, impacting fertility.
• The study reveals significant hormonal fluctuations, particularly melatonin and estrogen levels, in response to light.
• Cohort study design assessed hormonal levels over time, considering the effects of both short-term and long-term exposure.
• Findings highlight potential risks of artificial light on reproductive health, emphasizing the need for further research.