Tap water reduced sperm count
Chemicals used to disinfect water often contain chlorine, which can react with organic matter in the water to form compounds such as trihalomethanes THMs and haloacetic acids HAAs , known collectively as disinfection by-products DBPs. DBP exposure has been implicated in reproductive abnormalities, and earlier human studies have found associations between DBPs and adverse pregnancy outcomes. A new study of DBP exposure now shows only weak evidence of sperm quality damage from exposures at or below regulatory limits [ EHP —; Luben et al. Earlier studies have revealed little about the degree of risk from DBP exposure, especially for male reproductive health, and there have been few epidemiologic studies of the possible effects on sperm quality. Rodent studies suggest that drinking water exposure to HAAs, particularly brominated species, could pose a threat to human sperm. The current study assessed men recruited from couples participating in a project to determine whether DBPs affect spontaneous abortion.
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Why are sperm counts falling? 'Contraceptives in drinking water and chemicals in some plastics'
Chlorination by-products in tap water and semen quality in England and Wales
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What’s behind the epidemic of low fertility and shrinking male genitals?
Low levels of atrazine have been shown to turn male frogs into hermaphrodites. The researchers believe the chemical could be linked to the more-than per cent decline in human sperm count seen over the last 50 years. Multiple government investigations have determined that low levels of atrazine do not pose a risk to human health based on long-term studies that showed exposed animals were not any more likely to develop human-relevant cancers, nor more likely to have reproductive problems. That is the wrong test, says Dr Andrew Pask, the University of Melbourne scientist who led the research.
By Anna Hodgekiss for MailOnline. BPA is found in some plastics used to make food containers, bottles and coatings in tin cans, and is also commonly used in thermal paper in cash register receipts. Scroll down for video. But researchers claim BPA can disrupt hormones, raising the risk of a wide number of health problems such as diabetes, obesity and cancer.
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