- Flame retardants used in furniture escape into the air as household dust
- Study found women who breathed in chemicals were less likely to get pregnant
- Results prompted warning to couples to avoid products containing PFRs
Victoria Allen Science Correspondent For The Daily Mail
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Chemicals found in sofas, car seats and even yoga mats may be making it harder for women to become pregnant.
Flame retardants used in furniture escape into the air as household dust.
A study of women undergoing IVF found those who had breathed in the highest levels of these chemicals were nearly a third less likely to get pregnant.

Chemicals found in sofas, car seats and even yoga mats may be making it harder for women to become pregnant (Stock image)
It is believed the flame retardants, often used in foam stuffing, disrupt hormones that are important for fertility. Previous studies suggest they also make men’s sperm swim slower.
Researchers at Harvard T.H. Chan School of Public Health are the first to measure the chemicals in women’s urine. The results, from 211 women having IVF treatment, prompted the authors to warn couples to avoid products containing the chemicals, called organophosphate flame retardants (PFRs).
Lead author Dr Courtney Carignan said: ‘These findings suggest that exposure to PFRs may be one of many risk factors for lower reproductive success.
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‘They also add to the body of evidence indicating a need to reduce the use of these flame retardants and identify safer alternatives.’
Everyday chemicals believed to cause infertility include phthalates, which are found in PVC flooring and shower curtains, and quaternary ammonium compounds, or ‘quats’, found in disinfectants and mouthwash.
PFRs can be found in the foam inside sofas across Britain. They are also used in car seats. The levels of PFRs in British cars, measured in dust, are thought to be among the highest in the world. The US researchers also said they are often found in gym mats, such as those used for yoga, although it is unclear how widespread these mats are in the UK.

Flame retardants used in furniture escape into the air as household dust (Stock image)
Of the women studied, those with the highest concentrations of PFRs were 31 per cent less likely to get pregnant. It is thought that PFRs disrupt thyroid and sex hormones, which are both vital for couples starting a family.
Richard Anderson, professor of clinical reproductive science at the University of Edinburgh, said: ‘While this study doesn’t prove that these chemicals are the cause of the lower success rate, it provides a firm basis for further experiments to investigate them. It also provides strong support for the need to regulate our exposure to chemicals and test their potential impact on fertility.’
The US study, published in the journal Environmental Health Perspectives, found that most women had been exposed to PFRs.
However, flame retardants used in America are very often different to those used in the UK and Ireland.
Co-author of the study, Professor Russ Hauser, said: ‘Couples undergoing IVF and trying to improve their chances of success by reducing their exposure to environmental chemicals may want to opt for products that are flame retardant-free.’
Allan Pacey, professor of andrology at the University of Sheffield, said: ‘On the face of it, this data seems fairly convincing and support the idea that there is a link between a woman’s exposure to these flame retardant chemicals and her chances of getting pregnant. However, the data does not prove it, it only describes an association.’
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