We live surrounded by chemicals. Many of them are inert and harmless. But a substantial number — found in food packaging, personal care products, cookware, pesticides, upholstery, and water — are classified as endocrine disruptors: compounds that interfere with hormone synthesis, metabolism, binding, or signaling.
The reproductive system is particularly vulnerable to endocrine disruption because it relies on precisely timed, precisely dosed hormonal signals. Small perturbations — mimicking estrogen here, blocking androgen there — can cascade into disrupted ovulation, impaired follicle development, altered sperm production, or compromised implantation.
This is not a guide designed to induce environmental anxiety. It is an honest look at what the evidence shows, and a practical framework for reducing exposure where the evidence is strongest and the effort is reasonable.
BPA and Phthalates: The Estrogen Mimics
Bisphenol A (BPA)
BPA is a synthetic compound used to harden plastics and line food and beverage cans. It is an estrogen mimic — it binds to estrogen receptors and triggers estrogenic responses. Because the reproductive system is exquisitely sensitive to estrogen levels, BPA exposure is particularly concerning for fertility.
What the evidence shows:
A landmark Harvard study by Chavarro and colleagues (2009, Human Reproduction) measured BPA levels in follicular fluid and urine of women undergoing IVF. Higher urinary BPA was associated with significantly lower peak estradiol levels, fewer mature eggs retrieved, lower fertilization rates, and lower implantation rates. This is one of the most methodologically sound studies because it measured actual BPA exposure in reproductive tissue rather than relying on self-report.
A 2013 study in Fertility and Sterility similarly found that women in the highest quartile of urinary BPA had 24% fewer mature oocytes retrieved and lower implantation rates compared to women with the lowest exposure.
For men, BPA is associated with reduced sperm concentration, motility, and DNA integrity. Multiple studies of male factory workers with BPA exposure have documented significant sperm parameter impairment.
How BPA enters the body:
- Eating or drinking from plastic containers (especially when heated)
- Consuming canned foods (the can lining often contains BPA)
- Handling thermal paper receipts (BPA is used in thermal paper coatings)
- BPA-free plastics often contain BPS or BPF — structurally similar compounds with similar hormonal activity
Exposure reduction:
- Use glass, stainless steel, or ceramic containers for food storage and heating
- Avoid microwaving food in plastic containers
- Limit canned foods, or choose BPA-free canned goods (Eden Organics, Muir Glen)
- Minimize handling of thermal paper receipts — if you must handle them, wash hands before eating
- Do not assume BPA-free plastics are safe — they may contain analogues
Phthalates
Phthalates are plasticizers added to PVC plastic to increase flexibility, and are also used as solvents in personal care products and fragrances. They are among the most pervasive environmental chemicals, found in virtually everyone's urine in population studies.
Phthalates are anti-androgens — they interfere with testosterone synthesis and androgen receptor signaling. This makes them particularly relevant for male fertility.
Evidence for female fertility: A study in Environmental Health Perspectives found that women with higher phthalate metabolite levels had higher rates of endometriosis — a likely consequence of phthalates' ability to stimulate ectopic endometrial tissue growth. Other studies link phthalate exposure to impaired IVF outcomes, including fewer high-quality embryos.
Evidence for male fertility: Multiple studies show associations between phthalate metabolite levels and reduced sperm concentration, motility, and morphology. The anti-androgenic effects of phthalates are particularly relevant during male fetal development — prenatal phthalate exposure affects reproductive tract development — but ongoing adult exposure continues to suppress testosterone.
Primary sources:
- PVC plastic (many food containers, cling wrap, shower curtains)
- Personal care products with "fragrance" listed as an ingredient (shampoo, lotion, soap, cologne)
- Flexible vinyl flooring
- Medical tubing (relevant for patients on dialysis or with long hospital stays)
Exposure reduction:
- Replace PVC cling wrap with beeswax wraps, silicone lids, or glass containers
- Choose personal care products labeled "phthalate-free" or "fragrance-free"
- Use the EWG's Skin Deep database to check product safety scores
- Air out new vinyl products (shower curtains, flooring) before prolonged use
Taking Charge of Your Fertility Journey
Reducing environmental toxin exposure is part of optimizing the conditions for conception.
Before or alongside clinical treatment, many people explore at-home insemination. MakeAMom makes reusable at-home insemination kits — the CryoBaby for frozen or low-volume sperm, the Impregnator for low-motility sperm, and the BabyMaker for those with sensitivities — all designed for home use without a clinic visit.
Explore home insemination kits at MakeAMom →
Pesticide Exposure and IVF Outcomes
The Harvard Nurses' Health Study produced some of the most compelling research on pesticides and fertility. A 2017 analysis by Chiu and colleagues in the journal JAMA Internal Medicine followed women undergoing IVF and assessed their intake of fruits and vegetables with high versus low pesticide residues (based on USDA pesticide residue data).
Key findings:
- Women who consumed higher amounts of high-pesticide-residue produce had 18% lower probability of clinical pregnancy and 26% lower probability of live birth compared to women with the lowest exposure
- The association was strongest for fresh fruits and vegetables, not processed foods
- Men whose partners had high-pesticide produce intake showed similar associations with lower fertilization rates in IVF
This does not mean fruits and vegetables are bad for fertility — far from it. The study authors were careful to note that people in the high-pesticide group were still consuming more produce overall than those in the low-pesticide group. The findings suggest that pesticide residues on produce — rather than produce itself — may be the harmful factor.
The takeaway: shift toward lower-pesticide produce (or organic) for the specific fruits and vegetables that carry the highest residue loads.
The Environmental Working Group's Dirty Dozen (highest pesticide residue produce):
- Strawberries
- Spinach
- Kale/collard greens
- Peaches
- Pears
- Nectarines
- Apples
- Grapes
- Bell and hot peppers
- Cherries
- Blueberries
- Green beans
The EWG's Clean Fifteen (lowest pesticide residue): Avocado, sweet corn, pineapple, onions, papaya, asparagus, frozen sweet peas, honeydew melon, kiwi, cabbage, mushrooms, mangoes, sweet potatoes, watermelon, carrots.
Practical approach: You do not need to buy all organic. Prioritize organic for items on the Dirty Dozen list, and do not stress about Clean Fifteen items. Washing produce thoroughly with water (and optionally a produce wash) reduces but does not eliminate surface pesticide residues.
Heavy Metals: Lead, Mercury, and Cadmium
Lead
Lead has no safe level of exposure, particularly in pregnancy. Even low-level lead exposure is associated with impaired ovarian reserve (reduced AMH), menstrual disruption, and miscarriage. Lead accumulates in bone and is released during pregnancy — fetal exposure can occur even when current lead intake is minimal.
Sources to be aware of:
- Older homes (pre-1978) with lead paint — especially when renovating or if paint is peeling
- Lead pipes in older home water systems (get your water tested if you have pre-1986 plumbing)
- Imported ceramic dishes and pottery (lead glaze is still used in some countries)
- Certain imported spices (ground turmeric and cumin have tested positive for lead contamination in some batches)
- Traditional herbal remedies from certain regions (South Asia, Latin America)
- Imported candy and snacks
Mercury
Mercury is a neurotoxin that accumulates in reproductive tissue. For fertility, mercury's relevance is primarily dietary — from high-mercury fish. Mercury exposure is associated with impaired ovulation, increased miscarriage risk, and male sperm DNA damage.
High-mercury fish to avoid while trying to conceive: tuna steak, swordfish, shark, king mackerel, tilefish, orange roughy, marlin.
Lower-mercury fish that provide omega-3 benefits: wild salmon, sardines, herring, anchovies, trout, tilapia, shrimp, catfish.
Cadmium
Cadmium is a heavy metal found in tobacco smoke (the most significant source), certain fertilizers, and some foods (shellfish, kidney, liver, leafy greens grown in contaminated soil). It competes with zinc in the body — because it is structurally similar to zinc, it can displace zinc from reproductive enzymes and tissues.
Cadmium is associated with reduced ovarian reserve, disrupted steroidogenesis, and impaired spermatogenesis. Smoking is the most significant source of cadmium exposure — this is one of many reasons smoking is strongly contraindicated during fertility treatment and pregnancy.
PFAS: The Forever Chemicals
Per- and polyfluoroalkyl substances (PFAS) are a family of synthetic chemicals used in non-stick cookware, food packaging, water-resistant clothing, stain-resistant fabrics, and firefighting foam. They are called "forever chemicals" because they do not break down in the environment or the human body.
PFAS are endocrine disruptors with multiple reproductive effects:
- Associated with longer time-to-pregnancy in population studies
- Linked to impaired thyroid function (thyroid hormones are critical for follicle development and early pregnancy)
- Associated with reduced AMH and earlier menopause in some analyses
- In men, associated with reduced sperm count and motility
PFAS are virtually ubiquitous in the American population — the CDC National Health and Nutrition Examination Survey finds measurable PFAS levels in nearly all Americans tested.
Practical exposure reduction:
- Replace PTFE/Teflon non-stick cookware with cast iron, stainless steel, or ceramic-coated cookware (not ceramic-in-name-only — verify the coating is not PFAS-containing)
- Avoid microwave popcorn bags (PFAS-treated inside)
- Opt for uncoated paper food packaging when possible
- Check whether your local water supply is PFAS-contaminated (EWG has a PFAS contamination database)
- Consider a water filter certified to remove PFAS (activated carbon and reverse osmosis filters are effective)
Flame Retardants (PBDEs)
Polybrominated diphenyl ethers (PBDEs) are flame retardants used in upholstered furniture, electronics, and building materials. They are lipophilic (fat-soluble) and accumulate in human tissue over time.
PBDEs are thyroid hormone disruptors — they compete with thyroid hormones for binding proteins, potentially disrupting thyroid-regulated reproductive processes. Animal studies link PBDE exposure to impaired ovarian reserve, altered steroid hormone levels, and developmental reproductive toxicity.
Human epidemiological studies are more limited but show associations between PBDE levels and impaired fertility in women and men.
Practical reduction:
- Older foam furniture (pre-2005) may contain PBDEs — if the foam is exposed or deteriorating, replacing it is worthwhile
- Vacuum frequently with a HEPA filter (PBDEs migrate from foam into household dust)
- Wash hands before eating (reduces transfer of contaminated dust)
- Electronics, particularly older televisions and computer equipment, can off-gas PBDEs — ventilate spaces with older electronics
Personal Care Products and Fertility
The average person applies multiple personal care products daily — shampoo, conditioner, body wash, deodorant, moisturizer, sunscreen, makeup. Many contain endocrine-disrupting chemicals including:
Parabens: Preservatives with weak estrogenic activity. Found in most conventional cosmetics, shampoos, and lotions. Evidence for fertility harm is weaker than for BPA/phthalates, but given ubiquitous exposure and estrogenic activity, choosing paraben-free products is reasonable.
Triclosan: Antimicrobial agent (largely phased out of hand soap but still present in some products) that affects thyroid hormone levels.
Oxybenzone and other chemical UV filters: Found in chemical sunscreens; some evidence of hormonal activity. Mineral sunscreens (zinc oxide, titanium dioxide) do not have this concern.
Practical approach: Use the EWG Skin Deep Cosmetics Database to check scores for products you use regularly. Focus on reducing exposure from products with high application frequency (daily lotion, shampoo) rather than worrying about every product.
Cookware and Food Preparation
| Cookware Type | Concern | Recommendation |
|---|---|---|
| PTFE non-stick (Teflon) | PFAS exposure; fumes when overheated | Replace with cast iron or stainless steel |
| Ceramic non-stick | Generally safer; verify PFAS-free | Use at low-medium heat |
| Cast iron | Minor iron leaching (beneficial for most) | Safe; season regularly |
| Stainless steel | Minimal leaching of chromium/nickel | Safe for most; not ideal for acidic foods long-term |
| Aluminum (uncoated) | Some evidence of aluminum leaching | Avoid for acidic foods; not first choice |
| Glass | No leaching | Safest for storage; not stovetop-safe |
A Practical Reduction Priority List
Given that zero exposure is not possible, where should you focus limited time and attention?
Highest priority (strongest evidence, most controllable):
- Stop smoking (cadmium and multiple toxin sources)
- Switch high-pesticide produce to organic (Dirty Dozen)
- Replace PTFE non-stick cookware with cast iron or stainless steel
- Store and reheat food in glass or stainless steel, not plastic
- Choose fragrance-free personal care products
Medium priority: 6. Check water quality for lead (older homes) and PFAS 7. Use HEPA vacuum and increase ventilation to reduce household dust toxins 8. Limit canned food consumption or choose BPA-free-lined products 9. Check Skin Deep database for high-use personal care products
Lower priority (worth doing but don't stress excessively): 10. Organic cleaning products 11. Replacing older furniture foam 12. Water filter for PFAS removal
For Men: Occupational and Recreational Exposures
Men's fertility is also vulnerable to environmental toxins, with the added dimension of occupational exposures. Industries with documented sperm-toxic chemical exposures include:
- Pesticide application (organophosphates, carbamates)
- Lead smelting and battery manufacturing
- Solvent use (dry cleaning, painting, printing)
- Welding (heavy metal fumes)
- Radiation (ionizing radiation is directly damaging to spermatogenesis)
Men in these occupations should discuss occupational exposure with their doctor and follow applicable workplace safety protocols. For a comprehensive review of male fertility factors, see our male infertility causes and treatment guide.
Frequently Asked Questions
Q: What did the Harvard BPA study find about IVF outcomes? A: A landmark study by Chavarro and colleagues (2009, Human Reproduction) measured BPA in follicular fluid and urine of women undergoing IVF and found that higher urinary BPA was associated with significantly lower peak estradiol levels, fewer mature eggs retrieved, lower fertilization rates, and lower implantation rates. A 2013 Fertility and Sterility study found women in the highest quartile of urinary BPA had 24% fewer mature oocytes retrieved compared to women with the lowest exposure.
Q: How much do pesticides on produce affect IVF success? A: A 2017 analysis from the Harvard Nurses' Health Study (Chiu et al., JAMA Internal Medicine) found that women who consumed higher amounts of high-pesticide-residue produce had 18% lower probability of clinical pregnancy and 26% lower probability of live birth compared to those with the lowest exposure. The researchers noted the finding was about pesticide residues specifically — not produce consumption overall.
Q: What are PFAS and how do they affect fertility? A: PFAS (per- and polyfluoroalkyl substances) are synthetic "forever chemicals" found in non-stick cookware, food packaging, and water-resistant materials that do not break down in the environment or the body. They are associated with longer time-to-pregnancy, impaired thyroid function (critical for follicle development), reduced AMH, and in men, reduced sperm count and motility. The CDC finds measurable PFAS levels in nearly all Americans tested.
Q: Is cadmium from smoking really that significant for fertility? A: Yes — smoking is the most significant source of cadmium exposure, and cadmium is associated with reduced ovarian reserve, disrupted steroidogenesis, and impaired spermatogenesis. Cadmium competes with zinc in the body and can displace it from reproductive enzymes and tissues. This is one of the key mechanistic reasons smoking is strongly contraindicated during fertility treatment and pregnancy.
Q: Where should I focus my effort to reduce toxin exposure for fertility? A: The highest-priority steps with the strongest evidence are: stopping smoking (cadmium and multiple toxins), switching high-pesticide produce to organic from the Dirty Dozen list, replacing PTFE non-stick cookware with cast iron or stainless steel, storing and reheating food in glass or stainless steel rather than plastic, and choosing fragrance-free personal care products. Complete elimination of all exposures is not possible, but these targeted changes address the chemicals with the strongest fertility evidence.
The Bottom Line
Environmental toxins and endocrine disruptors are real contributors to fertility impairment — the evidence from studies on BPA, phthalates, pesticides, and PFAS is compelling and consistent. But the goal is not zero exposure (which is impossible) or environmental anxiety (which is counterproductive). The goal is targeted, evidence-based reduction of the highest-exposure sources with the strongest fertility impact.
Switching produce priorities, replacing non-stick cookware, choosing fragrance-free products, and avoiding plastic food containers are all low-cost, manageable steps that meaningfully reduce exposure to the chemicals with the strongest fertility evidence.
For PCOS-specific guidance on how endocrine disruptors affect the PCOS pathway, see our PCOS fertility guide.
