Human eggs collected in summer, as opposed to the fall, had a higher likelihood of a successful fertility treatment, the study showed.
, according to IVF Canada. The process involves removing eggs from ovaries and fertilizing them with sperm in a laboratory before being implanted in the womb.
In order to see if environmental factors contribute to live birth rates, the researchers looked at outcomes from all frozen embryo transfers carried out at a single clinic in Perth from January 2013 to December 2021. During this time, there were more than 3,600 frozen embryo transfers with embryos generated from 2,155 IVF cycles in 1,835 patients.
But unlike the study out of Perth, the researchers found that winter had the lowest success rates instead of the fall.Although the Perth study found that summer may make a difference when eggs are retrieved from an ovary, the reason why is still not known, Leathersich said.But there are theories, and one of them includes melatonin — the sleep hormone that helps with circadian rhythm and also has antioxidant qualities.
While recognizing the significance of studies like the one conducted in Perth, Taerk noted it’s not without limitations.“When we say there’s an association between summer and an increased rate of live birth rate, is it the sunshine that’s doing it? Is it other behavioural factors such as diet, lifestyle, the air quality?” he questioned.
Given the limitations of the study, he said it’s important for people considering IVF that delaying the procedure for a different season may come with risks.
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