The life expectancy of the children that are born in seasons with a lot solar activity is 5.2 years less than other infants, and they are also more likely to die during the first 24 months of birth.
This is because high exposures during the pregnancy to UV radiation may result in the reduction of Vitamin B9: folate , whose low levels are linked to greater mortality child, indicates a study of Norwegian University of Science and Technology (NTNU) .
Gine Rollo Skjaervoe , lead author, and his colleagues, came to this conclusion after analyzing the records of birth of 9000 children, stored in churches of the Nordic country between 1750 and 1900, and compare them with the amount of UV radiation presented during these years.
In this way they also discovered that the children that were born in years with lots of sun and that survived were more likely to have fewer children , and that these, in turn, had fewer children than the descendants of people born in years with less solar activity .
These findings demonstrate, according to the researchers, that the increase in exposure of the UV radiation during the years of high solar activity, they have a negative effect on life and fertility human, which is maintained through generations.
Although many factors intervene within the child survival and the fertility , researchers recommend not to "take" the sun if you are pregnant and also you want to have many children and grandchildren.
For its part, the World Health Organization recommended to avoid expose to the sun between 10 in the morning and four in the afternoon and always use sunscreen in the presence of UV rays .