Endocrine Disruptors, Microplastics and Fertility: What Is Actually Known
Please note that much of what I describe here comes from basic research, including cell and animal studies, and effects in humans have not been established.
In everyday life we are surrounded by a great many substances. Among them are the chemicals popularly called environmental hormones, known medically as endocrine disrupting chemicals (EDCs), and research suggests they may have some influence on our reproductive function. For anyone thinking about trying to conceive, this may feel like a subject too important to ignore.
Some readers may already carry a vague anxiety about it. Rather than denying that feeling, the first thing that matters is simply to receive the information calmly. In this article, as a specialist, I want to explain objectively what we know about EDCs hidden in plastics and everyday products, and the concrete steps you can take starting today. I hope it gives you a useful way of looking at your own body.
What Are Environmental Hormones (EDCs)?
Environmental hormone is a popular label; the medical term is endocrine disrupting chemical, or EDC. It is a collective name for chemical substances that may disturb the action of hormones in the body. They may be present in a surprisingly wide range of products: the food we eat, the plastic items around us, detergents, cosmetics and much more.
EDCs in the World Around You
Representative examples of EDCs include the following.
- Bisphenol A (BPA): this has been used in plastic food containers, receipt paper and the linings of cans. The shift to alternative materials is under way, but it remains widely present.
- Phthalates: these are found in plastic softeners, in everyday products such as shampoos and perfumes, and in medical devices.
- PFAS (per- and polyfluoroalkyl substances): these have been used in non-stick coatings on frying pans, in waterproofing sprays and in food packaging paper.
While these substances add convenience to our lives, concerns have been raised about their safety.
Possible Effects of EDCs on Reproductive Function
Animal experiments and cell-level studies to date suggest that EDCs may affect reproductive function in men and women in various ways.
In women, for example, effects on ovarian function and egg quality have been reported; in men, effects on sperm quality and sperm count. Whether these research findings apply directly to humans, however, has not been clearly settled. Studies in humans face substantial ethical constraints, and it is extremely difficult to prove a clear causal relationship between a specific substance and infertility.
How Much Is Known About Microplastics
Reports of microplastics detected in the human body have accumulated in recent years. All of them are small studies reporting detection — nothing more.
- A 2021 report examining placentas found fragments 5-10 μm in size in four of six placentas, twelve in total. Three were identified as polypropylene; the rest could only be identified by their pigments, which are used in coatings, paints, adhesives and cosmetics (PMID: 33395930)
- A 2022 study measuring the blood of 22 healthy volunteers identified four polymer types, with a mean quantifiable concentration of 1.6 μg per mL of blood (PMID: 35367073)
- A 2024 study of 20 healthy donors detected 24 polymer types in the blood of 18 of the 20 (PMID: 38761430)
What these show is that plastic particles are taken up into the body and can travel in the bloodstream. None of these studies examined any effect on fertility or pregnancy. The authors of the blood study note that understanding both exposure and hazard is needed before deciding whether this represents a public health risk.
"Found in the human body" makes a strong headline. The distance from there to "and therefore it makes conception harder" is still considerable.
Why This Matters to Women Trying to Conceive
It is natural for interest in EDCs to rise among women who are trying to conceive. The wish to create the best possible environment for a future pregnancy and birth is a very important feeling. Even though the information available at present is limited, as long as research suggests these substances may have some influence on reproductive function, taking an interest from a precautionary point of view is a meaningful way of protecting your own health.
For broader information about trying to conceive, you can return to the home page.
Simple Steps You Can Take Today
It is important to be clear about this first: none of the steps below have been shown to improve fertility outcomes in humans. They are simply practical, low-cost ways of reducing everyday exposure, and you can adopt as many or as few of them as fit your life. There is no need to overhaul your household, and there is certainly no need to blame yourself for choices you have made until now.
- Avoid heating food in plastic. Transferring food to glass or ceramic before microwaving reduces contact between hot food and plastic.
- Take care with scratched or aging containers and cookware. Replacing plastic containers and non-stick pans once the surface is damaged is a sensible habit.
- Reduce unnecessary handling of receipt paper, and wash your hands before eating after handling it.
- Choose simpler personal care products where you can, and use fragranced products in moderation.
- Ventilate and clean regularly, since household dust is one route of exposure.
- Favor fresh or minimally packaged foods where that is realistic for you, as part of a generally balanced diet.
None of this needs to become another source of pressure. Doing what is easy and sustainable, and letting the rest go, is entirely reasonable.
Frequently Asked Questions
Q1: How dangerous are endocrine disruptors and microplastics?
A1: They are studied as substances that may act like hormones in the body, but effects in humans vary widely between individuals and no clear causal relationship has been established. There is no need for alarm, though reducing exposure costs nothing and is easy enough to adopt.
Q2: Is a product labelled "BPA-free" safe?
A2: Not straightforwardly. Similar concerns have been raised about the substitutes used in their place, such as bisphenol S and F. Rather than relying on a label, changes in how you use things — transferring food out of plastic before heating it, for instance — are more practical.
Q3: Can I "detox" what is already in my body?
A3: No method claiming to flush out such substances has established evidence behind it. What this article describes are ways to reduce what comes in from here on.
Summary
Endocrine disrupting chemicals are present in plastics, everyday products and food packaging, and research at the level of animal and cell experiments suggests they may influence ovarian function, egg quality, and sperm quality and count. Whether those findings translate to humans remains unclear, and a clear causal link between a specific substance and infertility has not been demonstrated. In other words, this is a subject where interest is justified but certainty is not yet available.
If you feel anxious, it may help to remember that reducing exposure is a modest precaution rather than a treatment. Please do not carry your worries alone. If you have questions about your own situation, whether about exposure, about test results or about your fertility plan, talk them through with your own doctor or a fertility specialist, who can look at the whole picture with you.
References
- Plasticenta: First evidence of microplastics in human placenta. Environ Int. 2021. PMID: 33395930 (detection in four of six placentas)
- Discovery and quantification of plastic particle pollution in human blood. Environ Int. 2022. PMID: 35367073 (a small study of 22 healthy volunteers)
- Microplastics in human blood: Polymer types, concentrations and characterisation using μFTIR. Environ Int. 2024. PMID: 38761430 (a small study of 20 healthy donors)