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Exposure to wildfire smoke increases risk of going into labor prematurely
The detrimental effects of poor air quality on a person's health are well documented. But it's effect on preterm birth which is one of the leading causes of infant mortality globally is not known.
Researchers have found in one of the largest studies of its kind that exposure to wildfire smoke increases risk of going into labor prematurely. According to the research, poor air quality, such as smog, can lead to a number of adverse outcomes, including preterm birth (PTB).
Now, in a new study to be presented today at the Society for Maternal-Fetal Medicine’s (SMFM) annual meeting, The Pregnancy Meeting™-and published in the American Journal of Obstetrics & Gynecology-researchers will unveil findings that suggest that being exposed to another type of and potentially more dangerous pollutant-smoke from wildfires-increases a pregnant person’s chance of going into labor prematurely, also referred to as spontaneous preterm birth (versus one that is medically induced).
Wildfire smoke is especially harmful to people's health because it contains extremely fine particles that can enter deep into the lungs and may worsen medical conditions such as asthma and heart disease. These tiny particles can also travel hundreds and sometimes thousands of miles from the wildfire’s point of origin.
Researchers reviewed birth certificates and hospital delivery data from 2007-2012 of more than 2.5 million pregnant people in California. They compared that information with daily estimates of wildfire smoke intensity-based on satellite images-by zip code.
Data revealed that four weeks prior to conception through the first 20 weeks of pregnancy, 86 percent of pregnant individuals were exposed to at least one day of wildfire smoke, with an average exposure of 7.5 days. Results showed that wildfire smoke was significantly associated with spontaneous preterm birth, and each additional day a pregnant person was exposed to wildfire smoke slightly increased the odds of delivering an infant prematurely.
“Wildfires lead to acute and abrupt changes in air quality,” says the study’s lead author Anne Waldrop, MD, a maternal-fetal medicine subspecialist fellow at Stanford University in Palo Alto, Calif. “And some emerging evidence suggests that wildfire smoke could be worse for your health than other types of pollutants. So, even as we work to decrease other forms of air pollution, with wildfires becoming more frequent, more intense, and happening on a much larger scale, exposure to wildfire smoke is a serious public health problem, especially for vulnerable populations like pregnant people.”
Reference:
One of the largest studies of its kind finds being exposed to wildfire smoke increases risk of going into labor prematurely, Society for Maternal-Fetal Medicine. Meeting SMFM 43rd Annual Pregnancy Meeting
Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751