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PFAS Exposure During Pregnancy linked too Placental Dysfunction, New Research Reveals
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A groundbreaking study published December 12, 2025, reveals that exposure to per- and polyfluoroalkyl substances (PFAS) – frequently enough dubbed “forever chemicals” – disrupts crucial placental functions, particularly during the first trimester of pregnancy, possibly increasing the risk of miscarriage and impacting fetal development.
The placenta, vital for nutrient and gas exchange between mother and fetus, is increasingly recognized as a vulnerable point of exposure to environmental toxins. Previous research has struggled to accurately assess early pregnancy exposure, but a team at the Helmholtz Center for Environmental Research (UFZ) in Germany, collaborating with the Dessau Municipal Hospital, has overcome this challenge with a novel approach.
A New Model for Understanding PFAS Risk
Researchers have developed an advanced 3D placenta model to better analyze the risks associated with PFAS exposure. This model allows for a more realistic simulation of placental function than previous, simpler cell cultures. “For an accurate risk assessment, it is therefore crucial to document the exposure dynamics to PFAS more precisely, especially in the first trimester of pregnancy,” explained a UFZ reproductive scientist and study director.
The team focused on six specific PFAS compounds – perfluorononanoic acid, perfluorooctane sulfonic acid, perfluorobutanoic acid, perfluorooctanoic acid, perfluorohexane sulfonic acid, and perfluorodecanoic acid – extracted from the placental tissue of 31 women in their first trimester. These compounds were selected becuase they were found in high concentrations within the placenta and have been previously linked to pregnancy complications.
How PFAS Disrupt Placental Function
The 3D model revealed critically importent placental dysfunction when exposed to the PFAS mixture. Notably, the ability of placental cells to invade maternal tissue – a process essential for nutrient transfer and fetal growth – was impaired. This invasiveness is critical for the optimal development of the fetus.
Further analysis of gene expression showed that PFAS exposure disrupts the delicate balance between cell death (apoptosis) and cell reproduction (proliferation) within the placenta. According to researchers, this imbalance can significantly impact placental development.
The study also found a reduction in the production of beta-hCG (β-hCG), a key hormone that supports early pregnancy and prevents fetal rejection. This decrease could lead to disruptions in hormone regulation,potentially impacting pregnancy outcomes. “These are all just minor changes that have flown under the radar so far, but overall they could have a significant impact on the course of the pregnancy,” one researcher noted.
implications for Public Health
The findings underscore the potential dangers of PFAS exposure during pregnancy, even at low levels. the research team emphasizes the need for more precise monitoring of PFAS exposure, particularly during the critical first 90 days of gestation when the baby’s organs are developing.
“The study underlines the harmful effects of the PFAS mixture on trophoblast function and thus the potential risks for the health of the placenta and the outcome of the pregnancy,” concluded a senior official from the UFZ Department of Environmental Immunology. The use of 3D trophoblast models, they added, is proving invaluable for
