Study examines link between sperm quality and light from devices at night

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Men might want to think twice before reaching for their smartphone at night. A new study found correlations between electronic media use at night and poor sperm quality.

Preliminary results show that greater self-reported exposure to light-emitting media devices in the evening and after bedtime is associated with a decline in . Sperm concentration, motility and progressive motility—the ability of sperm to "swim" properly—were all lower, and the percentage of immotile sperm that are unable to swim was higher, in men who reported more smartphone and tablet usage at night.

"Smartphone and tablet use in the evening and after bedtime was correlated with decline in sperm quality. Furthermore, smartphone use in the evening, tablet use after bedtime, and television use in the evening were all correlated with the decline of ," said principal investigator Amit Green, Ph.D., head of research and development at the Sleep and Fatigue Institute at the Assuta Medical Center in Tel-Aviv, Israel. "To the best of our knowledge, this is the first study to report these types of correlations between sperm quality and exposure time to short-wavelength light emitted from digital media, especially smartphones and tablets, in the evening and after bedtime."

The researchers obtained semen samples from 116 men between the ages of 21 and 59 years who were undergoing fertility evaluation. Participants completed questionnaires about their and use of electronic devices.

The study also found a correlation between longer duration and higher sperm total and greater progressive motility. In contrast, greater sleepiness was associated with poorer sperm quality.

The research abstract was published recently in an online supplement of the journal Sleep for Virtual SLEEP 2020, which will be held Aug. 27-30.

More information: A Green et al, 0029 Light Emitted from Media Devices at Night is Associated with Decline in Sperm Quality, Sleep (2020). DOI: 10.1093/sleep/zsaa056.028

Journal information: Sleep
Citation: Study examines link between sperm quality and light from devices at night (2020, August 27) retrieved 26 February 2024 from
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