Endocrine Disruptors and Fertility: What Matters and What Is Overstated

Endocrine disrupting chemicals (EDCs) are substances that can interfere with the body's hormone systems. Well-known examples include bisphenol A (BPA, used in some plastics and can linings), phthalates (used to soften plastics and in some fragrances) and PFAS (very persistent "forever chemicals" used in non-stick, waterproof and stain-resistant coatings). Because fertility depends on finely balanced hormones in both partners, researchers have studied these chemicals closely.

This guide sets out what the evidence shows, what is overstated, and what is worth doing. If you have been trying to conceive for a year (or 6 months if you are 36 or over), see a GP: age, ovulation problems, sperm quality and blocked tubes are far more common reasons for difficulty than household chemicals.

What is claimed about endocrine disruptors and fertility?

Online, you will find claims that:

• plastics and "toxins" are behind falling sperm counts and rising infertility
• you must replace everything in your kitchen and bathroom before trying to conceive
• detox diets, supplements or home tests can clear these chemicals from your body

The first claim has some scientific basis but is oversimplified. The second is overkill. The third has no good evidence.

What does the evidence show?

What expert bodies say

• Endocrine Society: its second scientific statement reviewed evidence linking EDCs, including BPA and phthalates, to reproductive effects, mainly from animal and observational human studies. Its public pages explain where exposure comes from.
• ESHRE (European Society of Human Reproduction and Embryology): its 2024 factsheet says EDCs are contributing to worsening reproductive health, that exposure to human-made chemicals "correlates with" problems such as ovulatory disorders and infertility, and that most chemicals on the market have not been tested for reproductive toxicity. It highlights workplace exposure before conception for both partners.
• RCOG (Royal College of Obstetricians and Gynaecologists): its Scientific Impact Paper 37 is titled "dealing with potential, but unproven, risks". It aims to help pregnant and breastfeeding women take practical steps to minimise exposure without alarm.
• FIGO (International Federation of Gynecology and Obstetrics): issued an opinion calling for reduced exposure to environmental chemicals as a reproductive health issue.

Phthalates and sperm

A 2026 systematic review found phthalates, particularly DEHP and DBP, were linked to lower sperm concentration and changes in sperm shape. The authors graded certainty as low to moderate because the studies were observational, meaning other factors could explain some of the link.

PFAS and female fertility

A 2023 meta-analysis found higher PFAS levels were associated with lower fecundability (the chance of conceiving each month) and higher odds of infertility. Again, these are associations. EFSA has set a tolerable weekly intake for four PFAS, based on reduced response to vaccines rather than fertility.

BPA

In 2021, EFSA's draft re-evaluation proposed cutting the tolerable daily intake of BPA dramatically, mainly because of effects on the immune system in animal studies. This shows regulators take BPA seriously, but the change was not driven by fertility evidence, and human fertility studies on BPA are mixed.

What is overstated?

• "Chemicals are the main reason for infertility." For most couples, age, ovulation, sperm quality and tubal factors matter far more.
• "Every plastic is harmful." Different plastics behave differently. Cold, dry food in a plastic tub is a much smaller concern than hot, fatty food heated in plastic.
• Detox kits and cleanses. Your liver and kidneys clear most short-lived chemicals such as BPA and phthalates within days. There is no evidence that detox products speed this up. PFAS stay in the body for years, and no supplement removes them.
• Blood or urine tests for chemicals. Private tests rarely change what you should do and can cause worry.

What is practical and worth doing?

These steps are cheap, sensible and in line with RCOG and ESHRE messages:

1. Heat food in glass or ceramic, not plastic. Heat and fat increase how much can move from plastic into food. Use glass containers for leftovers and reheating.
2. Store fatty and acidic foods in glass. Oils, sauces and pickles in glass jars rather than soft plastic tubs.
3. Choose fragrance-free personal care where easy. "Parfum" on a label can hide many ingredients. Fragrance-free products remove one uncertainty, especially for products used daily on large areas of skin.
4. Eat fresh food more often than tinned or heavily packaged.
5. Look after your water supply sensibly. UK tap water is tightly regulated; a certified filter is optional.
6. Ask about workplace chemicals. ESHRE highlights occupational exposure for both partners. If you work with solvents, pesticides, metals or industrial chemicals, ask your employer or occupational health about protection.
7. Do not panic about what you cannot change. Focus on proven steps first: stopping smoking, cutting alcohol, a healthy weight, folic acid for women, and sex every 2 or 3 days.

Who should take most care?

• People who are pregnant or planning pregnancy, because the RCOG focuses on exposure during pregnancy and early development.
• Both partners, since sperm takes about 3 months to develop and ESHRE highlights paternal exposure before conception.
• People with workplace exposure to industrial chemicals or pesticides.

Our picks at a glance

How we chose

We picked low-cost products that support the two most practical steps: keeping hot or fatty food out of plastic, and cutting fragrance from daily products. All three are already reviewed on our site. We did not include supplements, detox products or chemical tests, because there is no good evidence they help.

Zero Plastic Rectangular Storage Box 100% Glass

A glass box with a glass lid, so food you reheat only touches glass and a small silicone seal. Caveat: the seal touches food if you overfill the box, and glass lids are heavier and can chip.

Kilner Clip Top Round Jar 2 Litre

A cheap, all-glass jar for oils, grains, sauces and pickles. Caveat: soda-lime glass does not like sudden temperature changes, so do not pour boiling liquid straight in.

Faith in Nature Fragrance Free Body Wash

A simple, low-cost way to remove fragrance from a product you use every day. Caveat: fragrance-free does not mean free of every chemical of concern, and phthalates are now less common in UK cosmetics than in the past.

Bottom line

The science linking endocrine disruptors to fertility is real but mostly observational, and expert bodies frame the risk as potential rather than proven. That justifies simple, cheap steps, such as heating food in glass, storing fatty foods in glass jars and choosing fragrance-free daily products, but not fear, detox kits or replacing everything you own. If you are struggling to conceive, the most useful step is a GP appointment for both partners.