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The effects of air pollution during pregnancy can affect the development of thyroid hormones, which are needed to regulate fetal growth and metabolism, say researchers at the University of the Basque Country.

In a study published in the journal Environmental research, The researchers studied the effects of nitrogen dioxide (NO2) և particles (PM2.5) և thyroxine (T4).

T4 is the main hormone of the thyroid gland, this hormone can be used to regulate fetal growth, metabolism, it also plays an important role in neurological development.

If the balance of thyroid hormones is not right, the risk of developing serious diseases increases.

The researchers found that there was a direct link between the effect of PM2.5 հղի և thyroxine levels in infants during pregnancy.

However, there was a less clear link to the effects of NO2.

a woman holding her pregnant belly during the day

The lead author of the study, Amaya Irizar-Loybide, says: “These results are in line with previous limited research. What we have seen in this study is that the effects of the first months of pregnancy have a direct effect on the balance of thyroid hormones.

“These children are prone to low thyroxine levels. As the pregnancy progressed, we found that these relationships gradually diminished, that is, the mother’s influence gradually became less important. In the last period of pregnancy, however, this connection becomes obvious again, but has the opposite effect. As the concentration of these fine particles increases, we have seen an increase in the level of thyroid hormones, which has the opposite effect on balance.

“It is unclear what mechanism is behind all this. In any case, we have come to the conclusion that the most sensitive periods of pregnancy in terms of air pollution are the early to late months.

“We need to continue to study whether exposure during pregnancy affects not only thyroid hormones, but also other aspects such as neuropsychological development, growth, obesity, etc.”

According to the relevant news, the birth rate is decreasing all over the world, and in European countries they are even lower than the replacement rate. While these reductions may be due to the delay in having children in many adults, the growing body of research suggests that this is not the whole picture. Air quality news examines environmental factors that may be responsible for our declining fertility rates. Photo by free funds

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