NEW YORK (Reuters Health) – Men with pregnancy problems may have the air they breathe, according to a new study by Chinese researchers.
According to the researchers, microscopic particles in the air called microspheres (PM2.5) can affect the quality of sperm, which can hinder the fertilization of a woman’s egg.
PM2.5 refers to particles with a diameter of 2.5 μm or less. This is about 3 percent of the diameter of a human hair.
Trialix “Air pollution is associated with a significant reduction in the size and size of normal sperm, which could lead to a large number of infertile couples,” said lead researcher Xiang Qian Lau. He is an assistant professor at the School of Public Health and Primary Care of the Chinese University of Hong Kong.
However, Lao cautioned that this study can not prove that PM2.5 causes damage to sperm, but the two are related.
“It can not be concluded that it is a causal relationship in this study, but the existing evidence of toxicology and other studies supports the possible causal relationship,” he said.
Testo Drive 365 Lau said that the exact way in which air pollution can affect sperm is unclear. Many of the components of fine particles, such as heavy metals and polycyclic aromatic hydrocarbons, have been linked to sperm damage in experimental studies.
Lao said the impact of air pollution on sperm is small, but due to the spread of pollution around the world, many men may be affected.
Because reducing air pollution can improve sperm quality, “we advocate for global strategies to reduce air pollution and improve reproductive health,” Lau said.
The abnormal sperm leads to infertility because it can not penetrate the ovum, said Dr. Tomer Singer, director of endocrinology and reproductive infertility at Lenox Hill Hospital in New York City.
“We have seen a trend in recent decades as the concentration of sperm, motor and sperm deteriorates,” Singer said. “It was difficult to determine what was the culprit.” Canada
“This study provides strong evidence to support a link between exposure to air pollution and abnormal sperm,” said Dr. Manish Fira, vice president of Urology at the Arthur Smith Institute of Urology in New Haven Park, Newark.
However, reports from the United States did not find similar results, suggesting that the negative impact can only be seen in areas of very poor air quality, he said.
Ferra described air pollution as a global health emergency and said that this new study suggests that low fertility can be a consequence for health.
“The next step is to link air pollution levels with pregnancy rates to determine if changes in semen translate into low fertility,” said Vera.
For the study, Lau and his colleagues collected data on nearly 6,500 Taiwanese men between the ages of 15 and 49. All men participated in the medical examination program between 2001 and 2014. The program included the evaluation of sperm quality, including the total number, shape, size and movement.
Exposure to PM2.5 levels of headlines per man was estimated over three months over two years. Sperm takes three months to occur, Lao said.
The researchers found a relationship between exposure to PM2.5 and abnormal sperm. Specifically, every 5 micrograms of PM2.5 per cubic meter of air for two years was associated with a decrease of about 1.3% in the shape and size of normal sperm.
It was also associated with a 26% increase in the risk of being in the bottom 10% of the size and shape of the sperm, after considering other potential effects on sperm quality, such as smoking, drinking, age and weight.
However, exposure to PM2.5 was associated with a significant increase in the number of sperm. According to the researchers, this could be a way for the body to overcome the worst quality of sperm in general.
The study found that similar results were seen three months after exposure to PM2.5.