PFAS and Miscarriage: What the Research Says About Pregnancy Loss
Studies link PFAS exposure to higher miscarriage risk, including recurrent pregnancy loss. Learn what the research shows and how to lower your exposure.
PFAS and Miscarriage: What the Research Says About Pregnancy Loss
Miscarriage is more common than most people realize. About 10-20% of known pregnancies end in loss, and for many families the cause is never identified. That “unexplained” label is one of the most frustrating parts of the experience, because it leaves you wondering what, if anything, could have been different.
Researchers have been looking at whether environmental chemicals play a role in some of those unexplained losses, and several recent studies are pointing at per- and polyfluoroalkyl substances, the synthetic compounds known as PFAS or “forever chemicals.” The findings are still building, but they are consistent enough that they deserve attention, especially if you are trying to conceive or are in the early weeks of pregnancy.
This is a sensitive topic, and I want to say up front: if you have experienced a miscarriage, it was not your fault. The point of this article is not to assign blame. It is to share what the research is finding so that families have information they can act on.
For more context on PFAS and reproductive health, see our guides to PFAS and female fertility and PFAS and pregnancy complications.
What Recent Studies Are Finding
Several studies published in 2024-2026 have examined the relationship between PFAS exposure and miscarriage risk. The results keep pointing in the same direction.
Recurrent unexplained miscarriage. A 2025 study published in Ecotoxicology and Environmental Safety examined about 200 women with recurrent unexplained miscarriages and found that exposure to multiple PFAS compounds was significantly associated with increased risk. Five individual PFAS showed significant links, including both long-chain and short-chain compounds. PFHxS (perfluorohexane sulfonic acid) was among the most strongly associated. The finding about short-chain PFAS is particularly important because those compounds were introduced as supposedly safer replacements for older PFAS, and this study suggests they may not be.
The Norwegian cohort. A 2026 study using data from the Norwegian Mother, Father and Child Cohort, one of the world’s largest pregnancy cohorts, examined PFAS levels and miscarriage outcomes. The Norwegian cohort is valuable because it follows families over time, which gives researchers a stronger basis for identifying patterns than a single snapshot would.
Hospital-based evidence. A 2024 case-control study conducted at a hospital in Shanghai measured PFAS levels in women who experienced missed miscarriage compared to controls. The study found associations between specific PFAS compounds and missed miscarriage risk, adding to the evidence from Western populations with data from a very different geographic and dietary context.
The Japan Environment and Children’s Study. A 2025 analysis from this large Japanese cohort examined PFAS exposure during early pregnancy and risk of late miscarriage, extending the evidence beyond first-trimester losses to later pregnancy.
Biological mechanism. A 2025 study published in Environmental Science & Technology explored one possible mechanism: researchers found that PFOA exposure caused macrophages (immune cells) to retain ammonia, which triggered an inflammatory cascade that led to spontaneous miscarriage in animal models. That is the kind of finding that moves the conversation from “these two things seem to happen together” toward “here is how one might actually cause the other.”
Why PFAS Might Affect Early Pregnancy
The first trimester is one of the most complex stretches in human biology. The embryo has to implant in the uterine lining, establish a blood supply through the developing placenta, and begin organ formation, all while the mother’s immune system learns to tolerate a genetically distinct organism instead of attacking it. Any disruption to these processes can end a pregnancy.
PFAS may interfere at several points. They are endocrine disruptors, meaning they can alter the hormonal signaling that maintains early pregnancy. Progesterone, for example, is critical for maintaining the uterine lining and supporting implantation. PFAS have been shown to disrupt progesterone and other reproductive hormones.
PFAS also cross the placenta. Researchers have detected these compounds in placental tissue, amniotic fluid, and cord blood, which means they are present in the immediate environment of the developing embryo from the very beginning. And because PFAS accumulate over years of exposure, the levels present during a pregnancy reflect a lifetime of intake, not just recent exposure.
Who Should Be Most Concerned
Everyone is exposed to some level of PFAS. These chemicals are in drinking water, food packaging, cookware coatings, stain-resistant textiles, cosmetics, and dozens of other everyday products. But certain groups face higher exposure:
People who live near PFAS manufacturing sites, military bases that used PFAS-containing firefighting foam (AFFF), or areas with known water contamination tend to have higher blood levels. Workers in industries that use PFAS-based products also face elevated exposure. And because PFAS accumulate over time, older individuals generally have higher levels than younger ones.
If you have experienced unexplained miscarriage, especially more than one, PFAS exposure is one of many factors worth considering. It is not the only possibility, and it may not apply to your situation, but the research suggests it belongs on the list of things to discuss with your healthcare provider.
Practical Steps to Lower Your Exposure
The changes that reduce PFAS exposure during pregnancy are the same ones that help with other pregnancy complications. If you are trying to conceive or are in the early stages of pregnancy, here is where to start.
Start with your water
Contaminated drinking water is one of the most significant PFAS exposure routes. A reverse osmosis system removes PFAS effectively. The APEC ROES-50 Reverse Osmosis System installs under the kitchen sink and handles PFAS along with heavy metals and other contaminants.
If plumbing work is not an option, the Clearly Filtered Water Pitcher is independently tested for PFAS removal and works right out of the box. To find out what is actually in your water, a Tap Score PFAS Water Test measures specific compounds. Our guide to certified PFAS water testing compares lab options.
Replace non-stick cookware
Traditional non-stick coatings can contain PFAS. Switching to uncoated materials eliminates that source. A Lodge Pre-Seasoned Cast Iron Skillet is just iron and oil, and Lodge confirms their products are PFAS-free. For more alternatives, see our non-stick cookware guide and stainless steel cookware guide.
Switch to glass food storage
PFAS can migrate from packaging into food, especially with heat. Glass containers remove that concern entirely. The Pyrex Simply Store 18-Piece Glass Food Storage Set covers everyday storage needs without any coatings.
For wrapping food, Bee’s Wrap Beeswax Food Wraps replace plastic wrap with beeswax-coated cotton. See our guide to PFAS-free food storage bags for more alternatives.
Audit your personal care products
PFAS ingredients turn up in cosmetics more than you might expect, especially in anything marketed as long-wear, waterproof, or smoothing. Our guides to PFAS in concealer and PFAS in face moisturizer can help you identify products to swap.
Timing Matters
PFAS half-lives in the body range from about two to eight years. That means you cannot clear them overnight. But every day of lower exposure starts tipping the balance in the right direction. If you are planning a pregnancy, starting these changes several months before trying to conceive gives your body a meaningful head start on reducing accumulated levels.
If you want to know where you stand, PFAS blood testing is available through some clinics and direct-to-consumer labs. It is especially worth considering if you live near a known contamination site or have experienced unexplained pregnancy loss.
For products that have already been vetted for PFAS, browse the PFAS Free Life Database.
Frequently Asked Questions
Can PFAS cause a miscarriage?
Multiple studies have found associations between higher PFAS levels and increased miscarriage risk. A 2025 study of about 200 women with recurrent unexplained miscarriages found significant links with five PFAS compounds, including both long-chain and short-chain varieties. Lab research has identified possible mechanisms, including PFAS-driven immune dysfunction and hormonal disruption. These are associations rather than proven causation, but the evidence is consistent across multiple studies and populations.
Which PFAS compounds are most linked to pregnancy loss?
PFOS, PFOA, and PFHxS are among the most studied compounds in relation to miscarriage risk. However, short-chain PFAS that were introduced as “safer” replacements are also showing up in the research. A 2025 study found that short-chain compounds were among those most strongly associated with recurrent miscarriage, which challenges the assumption that newer PFAS are less harmful.
Should I get tested for PFAS if I have had a miscarriage?
PFAS blood testing is available and may be worth considering, especially if you have experienced more than one unexplained miscarriage, live near a known contamination site, or have occupational exposure. Results can help you understand your baseline and motivate targeted exposure reduction. Discuss the option with your healthcare provider to decide if it makes sense for your situation.
How long does it take to lower PFAS levels?
PFAS half-lives range from about two to eight years depending on the compound. That is a long time, but levels begin dropping as soon as you reduce your intake. Starting exposure reduction several months before trying to conceive is the most effective approach. The biggest impact comes from filtering your drinking water and switching cookware and food storage away from PFAS-containing materials.