Sarah has covered news topics for digital and print publications. She holds a degree in broadcast journalism from the University of Nevada.
The study focused on Norwegian women who had not given birth previously. The pregnant study participants wore blue-light-blocking glasses for three hours before bedtime as well as any time they were exposed to light during the night. Researchers found that wearing blue-light-blocking glasses led to earlier production of melatonin, a hormone that helps regulate sleep-wake cycles and promotes sleep.
The study found that melatonin production began an average of 45 minutes earlier in the group that wore the blue-light-blocking glasses before bed, compared to their melatonin onset before the study. This group also fell asleep 41 minutes earlier, on average, than before the study.
Many people experience some form of sleep disruption during pregnancy, as it is a time when sleep often changes. This study suggests that blue light-blocking glasses may be a tool to help pregnant people fall asleep more easily without medication.
These findings support other research that blue-light-blocking glass may promote sleep. Blue light from screens of electronic devices, for example, can suppress the body’s natural melatonin production and interfere with a person’s circadian rhythm.