Are hidden environmental toxins affecting your fertility? Daily habits like heating food in plastic or using fragranced products may be affecting IVF more than most patients realise.
In this expert-led webinar, Dr Kristýna Frühaufová, PhD, Head Physician at Gynem Fertility Clinic, explains how everyday exposures—from plastics and cosmetics to air pollution and chemicals—can impact reproductive health, egg and sperm quality, and IVF outcomes.
Hosted by Clara Toombs, Founder of Fertilia AI, this session is designed to give you practical, evidence-based insights to help you better protect your fertility.
Age, hormones, and embryo quality tend to dominate fertility conversations. Those factors do matter, but they are not the whole picture. Daily exposure to chemicals in food, water, plastics, cosmetics, smoke, and the workplace can also shape reproductive health.
In practical terms, that can translate into poorer oocyte quality, lower sperm quality, difficulty with implantation, and a higher risk of miscarriage.
Environmental exposures can do more than disrupt hormones. They can trigger oxidative stress, which is linked to DNA damage in both eggs and sperm. Others may create a pro-inflammatory environment that makes implantation harder. In women, toxin exposure may reduce ovarian reserve; in men, it may lower sperm concentration and increase sperm mortality.
Some exposures matter more than others in fertility care. For patients trying to conceive, a few categories stand out because they are common and often modifiable.
Plastics and personal care products are high on the list. BPA and phthalates, found in plastics and in some cosmetics and fragrances, may affect estradiol and testosterone regulation. That makes routine habits—storing food in plastic, heating meals in plastic containers, or using heavily fragranced products—more relevant than they may seem.
Pesticides are another concern. Residues in nonorganic fruits and vegetables may affect the endocrine system and may contribute to miscarriages. This does not mean produce should be avoided. It means reducing pesticide exposure where possible becomes part of a fertility-minded diet.
Heavy metals also matter, especially lead, mercury, and cadmium. These may be present in contaminated water, in fish such as tuna, and in cigarettes. Air pollution and per- and polyfluoroalkyl chemicals—used in nonstick cookware, waterproof fabrics, and some food packaging—were also identified as possible fertility disruptors.
Then there is smoking, which stands apart because its effects are both strong and well woven into fertility outcomes. Across both sexes, smoking is one of the strongest toxic exposures affecting fertility.
People do not respond to environmental exposure in identical ways. Still, the broad patterns are clear enough to guide decisions.
For women, toxin exposure may reduce ovarian reserve and harm egg quality. If the damage is severe—especially if egg DNA has been affected—it may not be reversible. That is one reason age remains so important in female fertility: women are born with a fixed egg supply, and time itself is already working against egg quality.
For men, the picture is somewhat more encouraging because sperm renews more quickly. Sperm maturation takes 72 days, and the half-life of sperm is about 3 months. That means lifestyle changes made now may show up in semen quality within a relatively short window. If exposure is contributing to poor sperm quality, reducing it before treatment may have a more immediate payoff.
Embryos can also be affected indirectly. Toxins may interfere with implantation, create a pro-inflammatory environment, and increase miscarriage risk. For couples pursuing IVF, that makes environmental exposure more than a “wellness” issue. It becomes part of the treatment environment.
Patients often want a long list of everything to avoid. A shorter list is usually more useful because it is easier to act on. For most households, the first priorities are three familiar areas:
It also means choosing simple cleaning products with only a few ingredients, and looking for clean-label cosmetics or more natural fragrance options instead of heavily perfumed products.
Across the home, the goal is to cut down on unnecessary chemical exposure. Reading labels and choosing simpler products can reduce exposure without turning fertility treatment into a full-time detox project.
Diet advice around fertility often gets overcomplicated. Here, the practical message is straightforward. Organic food is preferable because it reduces exposure to high-pesticide foods. When organic options are not realistic, washing produce well and peeling it when possible can still help.
At the same time, some fish deserve caution because of mercury exposure. High-mercury foods such as tuna and swordfish should be limited.
This is less about eating “perfectly” and more about reducing the exposures that are easiest to control. A patient does not need to overhaul every meal overnight for these changes to be worthwhile.
After years of everyday exposure to plastics, fragrances, smoke, or workplace chemicals, many patients want to know whether stopping now can still help. The answer is mixed, but not discouraging.
Making changes is beneficial at any point. In men, improvements may appear relatively quickly because sperm has a short reproductive timeline. In women, the effect of reducing exposure is harder to predict because eggs do not regenerate in the same way, and age has a stronger influence on fertility outcomes. If damage to egg DNA is severe, it may not be reversible.
That is why timing matters. The sooner exposure is reduced, the better. But reducing toxins should not become a reason to postpone treatment when age is already a major factor.
For some patients, especially those in their forties, the desire to “clean everything up first” can become another form of waiting. That may backfire.
In that situation, moving forward is usually the priority. Environmental improvements still make sense, but they should happen alongside treatment rather than in place of it.
Fertility treatment is rarely shaped by a single factor. A patient can reduce plastics, stop smoking, and simplify products while still proceeding with the next cycle on time.
Occupation-related chemical exposure deserves a separate conversation because it can be harder to control than what happens at home. Hairdressers, people working with upholstery, dust, chemicals, remanufacturing, or similar materials may reasonably worry about whether work is undermining treatment.
The overall message is to reduce exposure as much as possible, especially around implantation and after pregnancy occurs. Limited exposure over a 3-month period was described as unlikely to be a major problem, and life still has to remain realistic. A short hobby painting session is not the same as spending hours each day around fumes. Likewise, many people in higher-exposure jobs do go on to have children.
Still, cumulative exposure may matter. If it is possible to take a break before implantation, that is reasonable. During pregnancy, the first trimester calls for particular caution. Known toxin exposure should be avoided as much as possible after conception.
Some environmental risks are easier to change than others. city air pollution is the obvious example.
That limitation is worth acknowledging because fertility advice can easily become overwhelming or guilt-inducing. Patients do not need to eliminate every environmental risk to make meaningful progress. The more useful goal is to focus on the exposures that are both common and modifiable: smoking, plastics, fragranced products, certain cosmetics, some cleaning agents, and avoidable occupational contact.
Patients often ask for a blood test or panel that can tell them whether environmental toxins are the reason IVF has been difficult.
Prevention comes first. It also reflects a basic reality of environmental medicine: the same exposure can affect different people differently. Two people may live similarly and respond very differently at the level of hormones, egg quality, sperm quality, or implantation.
There is, however, one related area that can be tested in fertility care: oxidative stress.
Oxidative stress can be measured in serum and in follicular fluid. In women, follicular fluid testing is mainly informative. It may help guide future lifestyle changes or supplementation for later IVF cycles, but it does not usually change treatment at the time of egg collection.
Not every fertility test has the same impact on treatment decisions. For women, oxidative stress results may offer context.
A note on GLP-1 weight loss medications during IVF
Patients using GLP-1 medications need a treatment plan that accounts for both fertility timing and medication safety.
But they should be paired with lifestyle changes, because the goal is not only weight loss but maintaining a healthier weight later. That balance matters if stopping the medication creates a risk of weight regain. The manufacturer suggests at least one cycle washout period before embryo implantation, and some products require a break of 1 month or 2 months depending on the medication.
Anyone taking these drugs should make sure the fertility team knows before procedures.
The most practical fertility advice is often the least glamorous. Before IVF, focus on the changes that reduce exposure without delaying care or making daily life unmanageable.
None of these steps guarantees a pregnancy. But each one lowers a source of avoidable stress on the reproductive system, and together they create a healthier baseline for treatment.
Environmental toxins are not the only reason IVF succeeds or fails, and they are rarely the only issue a couple is dealing with. Age, ovarian reserve, sperm quality, weight, and underlying medical conditions still matter enormously. But everyday exposures are one of the few areas where patients can take meaningful action right away.
There is room for meaningful change without chasing perfection. Start with the biggest wins—smoking, plastics, and unnecessary chemical products—then move forward with treatment on time, especially if age is already a factor.
Making changes is always beneficial. In men, improvements may be seen relatively quickly because the half-life of sperm is about 3 months. In women, the situation is different because they are born with a fixed egg supply, so age has a stronger effect on fertility. If the damage is severe, especially if egg DNA has been affected, it may not be reversible. The sooner exposure is reduced, the better.
The full impact is not yet fully understood because the environment has changed rapidly over recent decades. Epigenetic changes may be passed to next generations because they affect gene transcription rather than the DNA sequence itself. Obesity is one example of a condition that can create chronic inflammation and epigenetic changes that may increase obesity risk in offspring.
The manufacturer suggests at least one cycle washout period before embryo implantation. It may be used during the preparation phase when rapid weight reduction is needed, but then a break of 1 month or 2 months, depending on the product, should be taken. This has to be balanced against the risk of weight regain while off medication.
It can be helpful for patients with obesity, but it should be combined with lifestyle changes because the goal is not only to lose weight but also to maintain a healthy weight later. These medications also slow bowel motility and digestion, so if you are undergoing general anaesthesia, you may need a longer fasting period than the usual 6 to 8 hours because food may remain in the stomach for 12 or more hours.
It depends on which toxins or exposures are involved, but age is the more important factor here. At age 43, postponing a cycle may have a greater negative effect on the outcome than reducing exposure alone. Moving forward is better than delaying treatment.
Limited exposure over a 3-month period is unlikely to be a major problem. Sperm takes 72 days to mature, and the egg journey also takes about 3 months. Ideally, exposure should be reduced to zero, but if that is not possible, the situation should still be acceptable. Once pregnancy occurs, known toxin exposure should be avoided.
Dust itself may be harmful to the lungs, but the larger issue is the smaller chemical compounds that may be absorbed and potentially affect egg and sperm quality. If possible, taking a break before implantation is reasonable. Exposure should also be minimized after embryo transfer. During IVF, avoid doing things you might regret later if pregnancy is not achieved.
The effect is individual, and many hairdressers have children without issues. However, long-term occupational exposure may have an accumulative effect. Hair colour is considered safe in terms of oncological impact, especially in Europe, where regulations are strict.
Limiting exposure as much as possible is sensible, especially during the first trimester, which is a very sensitive period. A break of about 3 months around exposure was also discussed in relation to reproductive timing.
The right approach is balance. Spending hours per day painting warrants limiting exposure, but painting for half an hour per day as a hobby is acceptable. The goal is to reduce exposure while keeping life realistic.
There is no specific practical solution other than moving away from the city. Air pollution has always existed, and different forms of pollution have affected cities over time, including coal-related pollution in the past.
Quit smoking, reduce plastics, and improve cleaning and cosmetic choices. Do not heat food in plastic containers. Use normal plates instead of plastic. Choose simple cleaning products with only a few ingredients, and choose clean-label or natural fragrance products rather than heavily perfumed ones. Reading product labels and choosing simpler items can reduce unnecessary chemical exposure.
Hair dye and other hair products can involve chemical exposure because they are absorbed through the scalp, so cleaner alternatives should be sought. Henna is one example of a cleaner alternative, although it may not suit everyone. It can be difficult to identify fertility-friendly products, so reading labels carefully is important.
More supplements are not necessarily better because each product contains many chemical compounds that may interfere with absorption of vitamins or minerals in the body. In general, folic acid for women and vitamin D are usually advised, and nothing more. Multivitamin products are not routinely needed.
Prevention is the first priority. There is no available commercial test that can reliably tell you your overall level of toxin exposure because the effects can accumulate over years. People are also affected differently by the same exposure, so the body’s response is individual.
Yes. Oxidative stress can be tested in serum and also in follicular fluid. Follicular fluid testing is mainly informative because it does not change treatment at the time of egg collection. It may still help guide future lifestyle changes or supplementation to improve later IVF cycles. This type of testing is considered more useful in men because it more directly translates into recommendations that can improve sperm quality.
