Is the conception rate quietly dropping by 40%? Many couples trying to conceive are exposed to it every day, but remain completely unaware!

Why Can’t I Get Pregnant Despite Normal Test Results?

This is a common concern for many couples trying to conceive. In our clinic, we often see couples arrive with a thick stack of test reports: fallopian tubes open, ovarian function normal, semen parameters within range, hormone levels unremarkable—yet after a year or more of trying, there is still no positive result. In many cases, they are ultimately given the frustrating diagnosis of “unexplained infertility.”

But in truth, the issue may not lie with the reproductive system itself. In recent years, a growing body of research has revealed that certain environmental toxins hidden in daily life are silently affecting human fertility. Among them, one class of substances deserves special attention: PFAS (per- and polyfluoroalkyl substances).

For families planning natural conception, IVF, third-generation IVF in Thailand, overseas fertility treatment, or cross-border childbirth, understanding and avoiding these hidden risks may be even more important than simply taking supplements.

A Longitudinal Study: PFAS May Significantly Reduce Women’s Chance of Conception

A research team in Singapore published a study in the international environmental science journal Science of the Total Environment, following 382 women trying to conceive over the course of a year. The researchers focused on the relationship between PFAS exposure levels and fertility outcomes. The findings showed:

• Clinical pregnancy rates decreased by approximately 30%–40%;
• Live birth rates decreased by approximately 34%;
• When concentrations of multiple PFAS compounds were elevated, the likelihood of conception decreased by an average of 5%–10%.

In other words: if a healthy woman has roughly a 20% chance of natural conception each month, those with prolonged higher exposure to PFAS may see that probability drop to 12%–14%. For women of advanced maternal age, this effect is often amplified.

What Exactly Are PFAS?

PFAS are known as “forever chemicals.” Their chemical structure is extremely stable, making them difficult for the body to break down and eliminate. Some PFAS can persist in the human body for years or even longer.

What is even more concerning: they do not cause immediate illness, but they continuously interfere with the body’s normal endocrine system. For women trying to conceive, this long-term, insidious effect deserves particular caution.

Why Are Test Results Normal, Yet Pregnancy Doesn’t Happen?

Many people wonder: if PFAS are so harmful, why don’t routine checkups detect them? The reason is simple. Standard pre-conception screenings typically focus on:

• Ovarian reserve;
• Fallopian tube patency;
• Uterine environment;
• Semen quality;
• Hormone levels.

PFAS are environmental toxins and are not included in routine testing. They do not directly damage organ structure but exert their effects through the endocrine system.

1. Disrupting Hormonal Balance

PFAS may interfere with the normal secretion rhythms of estrogen and progesterone. When the ovulation cycle is affected, the chance of natural conception decreases.

2. Affecting Follicle Development

Studies have found that long-term exposure to PFAS may affect the quality of follicle development. Even if ovulation occurs, high-quality eggs may not be obtained.

3. Increasing the Risk of Reproductive Disorders

Some research suggests PFAS may be associated with: endometriosis; polycystic ovary syndrome (PCOS); and recurrent implantation failure. For those undergoing IVF treatment, PFAS may also affect egg quality, embryo quality, and ultimately pregnancy outcomes.

Everyday Items You May Be Using That Could Contain PFAS

Many people think environmental toxins are far removed from daily life. In reality, they are all around us.

Kitchen Items

• Non-stick pans with damaged coatings;
• Low-quality cookware;
• Non-stick utensils used at high temperatures for extended periods.

Takeout and Fast-Food Packaging

• Grease-proof paper bags;
• Disposable paper cups;
• Takeout containers;
• Burger wrappers.

Cosmetics and Skincare Products

• Waterproof mascara;
• Long-lasting lipstick;
• High-SPF sunscreen;
• Long-wear makeup products.

Clothing and Household Items

• Waterproof jackets;
• Stain-resistant sofas;
• Oil-resistant tablecloths;
• Water-repellent bedding.

Drinking Water

Groundwater near industrial areas and contaminated water sources may also contain detectable levels of PFAS residues.

Before Trying to Conceive or Starting IVF, These 3 Steps Matter More Than Blind Supplementation

Many families spend significant time and money on supplements during preconception: CoQ10, DHEA, folic acid, various vitamins. These are certainly important. But if you continue to be exposed to environmental toxins, many of these efforts may be undermined.

A truly scientific approach to preconception is both adding and subtracting: adding what is needed while reducing the burden.

Step 1: Replace Kitchen Cookware

It is recommended to prioritize: medical-grade stainless steel pots; ceramic pots; cast iron pots. Non-stick pans with scratches or peeling coatings should be discarded promptly.

Step 2: Reduce Consumption of Packaged Foods

• Eat less takeout;
• Eat fewer fast-food meals;
• Minimize use of disposable tableware;
• Limit consumption of large deep-sea predatory fish;
• Drink purified or filtered water.

For those undergoing third-generation IVF in Thailand or planning overseas fertility treatment, this step deserves particular attention.

Step 3: Simplify Skincare and Makeup

During preconception: avoid long-term use of cosmetic products that emphasize ultra-waterproof, ultra-long-wear, oil-proof, and sweat-proof features. Also maintain a clean home environment and reduce dust accumulation.

The Foundation of a Healthy Pregnancy Is a Clean and Stable Internal Environment

Whether through natural conception or assisted reproductive technology such as IVF, what truly determines success is never just age, ovarian function, or medical technique. The internal environment of the body matters just as much.

In recent years, more families seeking third-generation IVF in Thailand, overseas fertility treatment, or cross-border childbirth have begun to pay attention to: environmental toxin management; nutritional management; sleep management; and emotional management—because these factors collectively influence egg quality, sperm quality, and the potential for embryo development.

As a professional organization focused on global assisted reproductive services, Global New Life believes that scientific preconception is not just about adding more; it is also about learning to subtract. Supplementation is addition; reducing toxin exposure is equally important.

If you are currently trying to conceive, undergoing IVF treatment, or planning to travel to Thailand for third-generation IVF, overseas fertility treatment, or cross-border childbirth services, the professional consultant team at Global New Life offers full-process overseas medical accompaniment and fertility planning services to help you scientifically improve your chances of a healthy pregnancy.