For us, the sun is what gives life and how our every day begins..

But is sunlight always good

We already know that ultraviolet light causes melanoma, but is that all

Researchers at the Norwegian University of Science and Technology suggest that women's excessive exposure to the sun contributes to reduced fertility..

A new study, published in the Proceedings of the Royal Society B, shows that ultraviolet radiation had a pronounced negative effect on fertility and mortality for many generations of people..

“Several long-term scientific studies in various species, including humans, have revealed that environmental factors that act on the body at an early age leave an imprint on its health in the future, including the ability to reproduce, and affect.

Church records from 1750-1900, which were obtained in two different parts of Norway, included information about 9062 local residents.. Scientists using them could analyze the life history of these people, including finding out the number of children and the age at which children were born, their survival rate and further fate..

Doctor Gine Roll Skj? rvo and colleagues compared this information with data on the sun in the region and drew interesting conclusions.. They found that children who were born during a period of high solar activity had a greater risk of dying at an early age..

Shorter life and lower fertility.

Solar activity is measured by the number of sunspots observed on the surface of the sun.. This indicator varies and depends on the 11-year cycle, in which 8 years are low activity and 3 years are high activity..

Doctor Skj? rvo has calculated the amount of ultraviolet radiation in each year for a century and a half, using data on solar activity cycles. The higher the activity of the sun, the more ultraviolet light penetrates our atmosphere..

The researchers say that the life expectancy of children born in years of high solar activity was on average 5.2 years shorter than that of the rest.. And during the first two years of life, such children died much more often..

One possible explanation for this relationship is that ultraviolet radiation causes the decomposition of folic acid (vitamin Bc). Folic acid is an extremely important substance during pregnancy, which helps to avoid some birth defects, it is necessary for the health of offspring..

The authors also found that children who were born during a period of high solar activity, on average, have fewer children.. The scientists write: “Fertility and reproductive success throughout life are lower in those born during these three years of high solar activity.”.

Don't sunbathe!

Doctor Skj warns about this? rvo of all pregnant women.

Families with low socioeconomic status are most exposed to UV rays. Perhaps this is due to predominantly physical work in the air.. In such families, women are most at risk, because during pregnancy, an excess of solar ultraviolet radiation for obscure reasons can harm the baby..

The authors say nutritional quality can also affect the likelihood of fetal DNA damage, but specific studies are needed to identify such factors..

medbe. en.