Prenatal Exposure To PFOS And PFOA In A Pregnant Women

…More

PFOS and PFOA pregnant women in Reus, Spain were exposed to before birth. We checked for these chemicals in maternal plasma during the first trimester, at delivery, and in cord blood. We figured out dietary exposure to PFOS and PFOA by using food frequency and water intake questionnaires. We also used existing data on food levels from the same area. Plus, we calculated exposure from breathing air and ingesting indoor dust. Finally, we used a PBPK model to nail down the prenatal exposure for the fetus or child and to make sure our exposure estimates matched the biomonitoring results. We did probabilistic calculations of fetal exposure using forward internal dosimetry and Monte-Carlo simulation. Mean plasma levels of PFOA were 0.45, 0.13, and 0.12 ng/mL at the first trimester, at delivery, and in cord plasma, respectively. For PFOS, those levels were 2.93, 2.21, and 1.17 ng/mL. We found traces of PFOS in all trimester and delivery samples, and in almost all cord blood samples. We estimated that about 70% of PFOS and 60% of PFOA transferred across the placenta. We noticed a trend: plasma levels of PFOS and PFOA have dropped compared to data from 10 years ago in the same area. Just like many other studies, our findings show that diet was the main way these pregnant women were exposed to PFOS and PFOA. It’s really important to understand exposure during key periods, like fetal development, not just for perfluoroalkylated substances but for other endocrine disrupting chemicals too.

The post appeared first on .

Source: Water Feed

Frequently Asked Questions

What are PFOS and PFOA, and why are they a concern?
PFOS (perfluorooctane sulfonic acid) and PFOA (perfluorooctanoic acid) are persistent synthetic chemicals belonging to the PFAS family, often called ‘forever chemicals.’ Historically used in various industrial and consumer products, they have led to widespread environmental contamination, including water sources. Their persistence and potential health impacts, particularly during critical developmental windows like pregnancy, make them a significant public health concern.

What are the primary routes of PFOS and PFOA exposure for pregnant women?
The study in Catalonia, Spain, identified dietary intake—through contaminated food and water—as the main route of exposure to PFOS and PFOA for pregnant women. Other calculated exposure routes included air inhalation and indoor dust ingestion. Understanding these pathways is crucial for developing effective strategies to mitigate exposure during fetal development.

Do PFOS and PFOA transfer from a pregnant mother to her fetus?
Yes, the study confirmed significant transplacental transfer of both PFOS and PFOA from mother to fetus. Researchers estimated transfer rates of approximately 70% for PFOS and 60% for PFOA. This highlights the critical importance of monitoring and reducing exposure to these endocrine-disrupting chemicals during pregnancy to protect fetal health.

What were the measured levels of PFOS and PFOA in pregnant women and newborns in the Catalonia study?
In the Catalonia cohort, mean plasma levels of PFOA were 0.45 ng/mL in the first trimester, decreasing to 0.13 ng/mL at delivery and 0.12 ng/mL in cord plasma. For PFOS, mean levels were 2.93 ng/mL in the first trimester, 2.21 ng/mL at delivery, and 1.17 ng/mL in cord plasma, indicating significant exposure throughout pregnancy and at birth.

How can individuals, especially pregnant women, reduce exposure to PFOS and PFOA?
Given that dietary intake, including water, is a primary exposure route, ensuring clean drinking water is paramount. Advanced water purification systems, such as those utilizing reverse osmosis (RO) technology like AMPAC USA’s commercial and industrial systems, are highly effective at removing these persistent chemicals. Additionally, minimizing consumption of potentially contaminated foods and avoiding products containing PFAS can help reduce overall exposure.