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

Date:
August 27, 2020
Source:
American Academy of Sleep Medicine
Summary:
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.



FULL STORY ==========================================================================
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 quality. 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 sperm concentration," said principal investigator Amit Green, PhD, 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 sleep habits and use of electronic devices.

The study also found a correlation between longer sleep 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. SLEEP is the annual meeting of the Associated Professional
Sleep Societies, a joint venture of the American Academy of Sleep Medicine
and the Sleep Research Society.


========================================================================== Story Source: Materials provided by
American_Academy_of_Sleep_Medicine. Note: Content may be edited for
style and length.


========================================================================== Journal Reference:
1. Y Dagan, Y Dagan, A Kahane, L Shine, S Barak, A Green. 0029
Light Emitted
from Media Devices at Night is Associated with Decline in Sperm
Quality.

Sleep, 2020; 43 (Supplement_1): A12 DOI: 10.1093/sleep/zsaa056.028 ==========================================================================

Link to news story: https://www.sciencedaily.com/releases/2020/08/200827102140.htm

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