When it comes to choosing period products, comfort and absorbency are usually top priorities. But there’s another, often-overlooked factor that deserves just as much attention: the impact of fabrics on your hormones and reproductive health.

At POM, we believe your period products should support your body, not compromise it. That’s why all of our period underwear is made from GOTS-certified organic cotton or ultra-soft bamboo, and why we say no to harmful chemicals like PFAS. Because when it comes to your health, peace of mind shouldn’t be optional.

 

POLYESTER AND HORMONAL DISRUPTION: WHAT THE SCIENCE SAYS

In one clinical trial involving women, polyester garments led to a 10–15% drop in progesterone, a key hormone that supports a healthy menstrual cycle and fertility. Participants also experienced irregular periods, which can signal deeper hormonal imbalance.

Why is this important? Low progesterone levels are often associated with:

• Irregular or missed cycles
  
• Difficulty conceiving
  
• Increased miscarriage risk
  
• Mood changes, anxiety, and sleep disturbances
  
• Hot flashes and early menopausal symptoms
  
  

This kind of disruption is the last thing your body needs, especially during your cycle.

 

THE HIDDEN CHEMICALS IN POLYESTER 

Polyester itself isn’t hormonally active, but the chemical treatments often used on it are. Many mainstream brands of leak-proof underwear use PFAS (Per- and Polyfluoroalkyl Substances) - also known as “forever chemicals” - to create water-and stain-resistant layers.

PFAS have been linked to:

• ~40% reduced fertility in women
  
• Longer time to pregnancy
  
• Fewer live births
  
• Higher risk of PCOS and endometriosis
  
  

These chemicals don’t easily break down, and when worn against your most sensitive skin, they can be absorbed directly into the body. At POM, we’re proud to say that our period underwear is completely PFAS-free—because nothing should come between you and your hormones.

 

HOW TO PROTECT YOUR HORMONAL HEALTH 

If you’re looking to make safer choices for your cycle, here are some key steps you can take:

1. Prioritise natural, certified fabrics
   Look for organic cotton, TENCEL™, bamboo, or wool with GOTS or OEKO-TEX® certification - like what we use at POM.
   
   
2. Avoid synthetic performance fabrics for everyday use
   Especially those marketed as antimicrobial, leakproof, or stain-resistant—they’re often treated with PFAS or other endocrine-disrupting chemicals.
   
   
3. Wash all synthetic clothing before use
   This can help remove some surface chemicals (though not all, especially PFAS).
   
   
4. Reduce exposure to hormone disruptors in other areas
   Think BPA-free containers, clean cosmetics, and non-toxic cookware. Every small change counts.
   
   

WHY POM PERIOD UNDERWEAR IS A SAFER CHOICE

At POM, we make period care that’s as safe and sustainable as it is effective. Our range includes:

• GOTS-certified organic cotton period underwear - breathable, soft, and free from toxins
  
  
• Bamboo period underwear - moisture-wicking, silky-smooth, and eco-friendly
  
  
• 100% medical-grade silicone menstrual cups - reusable, hypoallergenic, and ideal for those seeking a plastic-free alternative
  
  

We’re here to offer products that support your well-being, comfort, and confidence—without compromise.

Your period products should never work against your body. With POM, you can choose peace of mind, every single cycle.

 

 

 

 

 

References

1. Shafik, A. (1992). Effect of Different Types of Textiles on Sexual Activity. Journal of Urology, 147(1), 78–81. PubMed

2. Shafik, A. (1993). Contraceptive effect of polyester-induced electrostatic field in dogs. Contraception, 47(5), 513–520. Overview
   

3. Kim, S., et al. (2011). Association of phthalates and BPA with reproductive hormones and semen quality in humans. Environmental Research, 111(5), 769–776. PubMed

4. Tian, Y., et al. (2022). Association between PFAS exposure and reduced fertility in women: A systematic review. Science of the Total Environment, 829, 154489. ScienceDirect

5. Kahn, L. G., et al. (2020). Endocrine-disrupting chemicals: implications for human health. The Lancet Diabetes & Endocrinology, 8(8), 703–718. The Lancet
   

6. Fenton, S. E., et al. (2021). Per- and Polyfluoroalkyl Substances (PFAS) and Female Reproductive Health. Journal of Endocrinology and Metabolism, 106(11), 3202–3214. NCBI

7. Environmental Working Group (EWG). (2020). Toxic “Forever Chemicals” Found in Thinx Period Underwear. EWG Report
   

8. Discover Magazine. (2023). Fabrics Like Polyester Can Contain Chemicals That Might Impact Fertility. Discover Article

9. Little Hedonist. (2023). Is Polyester an Endocrine Disruptor? Blog