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Physically demanding jobs and shiftwork ‘can lower female fertility’
Female fertility may be negatively impacted by physically demanding jobs or regular work outside normal office hours, according to research.
Published in the journal Occupational & Environmental Medicine, the study looked at indicators of ovarian reserve and ovarian response in 473 women attending a fertility clinic, before comparing these results to assessments of their working patterns.
It was shown that women with physically demanding jobs had a lower reserve of eggs than those whose work did not regularly require heavy lifting. Among those undergoing IVF, those with physically demanding jobs had a nine percent lower total reserve of eggs and 14.5 percent fewer mature eggs.
These differences were even greater among women doing evening and night shift work, who had fewer mature eggs on average, possibly because of disruption to their body clock.
The researchers concluded that their results "suggest that occupational factors may be more specifically affecting oocyte production and quality, rather than accelerating ovarian ageing".
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