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Prenatal Exposure to DEHP may Result in Male Infertility
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Prenatal Exposure to DEHP may Result in Male Infertility

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Highlights:
  • Prenatal exposure to DEHP may affect male fertility in future generations.
  • The chemicals may lead to reproductive abnormalities like decreased sperm count and sperm mobility .
  • DEHP is an endocrine-disrupting chemical

Consumer products that are used daily contain a variety of chemicals which may affect the sperm count and sperm quality among men, finds a study. The findings of the study are submitted at ENDO 2018, the 100th annual meeting of the Endocrine Society, in Chicago, Ill.

The study found a chemical called endocrine-disrupting chemicals present in the plasticizer that affected the hormones present in the body. The effect of the chemical may extend to successive generations. "Sperm counts among men have dropped substantially over the last few decades, but the reason for such an alarming phenomenon is not known. These results suggest that when a mother is exposed to an endocrine disruptor during pregnancy, her son and the son's future generations may suffer from decreased fertility or hormone insufficiency," said lead author Radwa Barakat, B.V.S.C., M.Sc., of the College of Veterinary Medicine, University of Illinois at Urbana-Champaign, Urbana, Ill.

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The scientists studied the effect of DEHP (di-(2-ethylhexyl) phthalate), the most widely used endocrine-disrupting chemical. DEHP is found in a wide range of industrial and consumer products, including polyvinyl chloride (PVC) piping and tubing, cosmetics, medical devices and plastic toys. A group of male mice were exposed to DEHP prenatally and the results indicated that the male mice had significantly less testosterone in their blood and fewer sperm in their semen and also became infertile at a very young age.

"Most surprisingly, the male mice born to male mice that were exposed to DEHP also exhibited similar reproductive abnormalities--indicating prenatal exposure to DEHP can affect the fertility and reproductive capacity of more than one generation of offspring," Barakat said. "Therefore, DEHP may be a contributing factor to the decreased sperm counts and qualities in modern men compared to previous generations."
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The researchers gave four doses of DEHP or a type of corn oil to pregnant mice, from 11 days after they conceived until birth.

The adult males born to these mice were mated with unexposed female mice, to produce a second generation of mice. Then young adult male from second generation were mated with unexposed females to produce a third generation. The scientists then measured the sex hormone levels, sperm concentration and sperm motility in each generation of mice when they were 15 months old.

The second generation males, which descended from mice with highest DEHP exposure had abnormal reproductive results like lower testosterone concentration, sperms levels and sperm motility. Third generation males which descended from mice that were exposed to minimal DEHP also had reproductive issues. The results indicated that the lowest DEHP dose group exhibited the greatest abnormalities.

"This study underscores the importance of educating public to try their best effort to reduce their exposure to this chemical and also the need to substitute this chemical with a safer one," Barakat said.



Source: Medindia

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