Navigation Links
Chemical in Plastics May Cause Fertility Problems

Exposure to BPA might lessen chances of successful pregnancy, research suggests

THURSDAY, Nov. 13 (HealthDay News) -- Bisphenol A, a controversial chemical used to harden plastic packaging for many foods and beverages, may affect human reproduction, researchers report.

Bisphenol A (BPA) could hurt the chances of successful in vitro fertilization, or the ability of embryos to attach to the uterus, according to presentations at the American Society for Reproductive Medicine's annual meeting, which concluded Wednesday in San Francisco.

"The issue of environmental toxicants upon human reproduction is very important," said Dr. Richard J. Paulson, chief of the Division of Reproductive Endocrinology and Infertility at the University of Southern California Keck School of Medicine, who was not involved in the studies.

Last month, a U.S. Food and Drug Administration advisory panel said the agency had erred when it said that BPA, which is widely used in baby bottles and other plastic packaging for foods and beverages, posed no health risks. The agency said it would probably start research early in 2009 to determine the toxic effects of BPA on babies less than 1 month old.

In the first report, a team led by Dr. Julie Lamb, of the University of California, San Francisco, measured levels of BPA in people going through their first cycle of in vitro fertilization (IVF). Ninety-three percent of the 41 women had measurable BPA levels; among the 31 men, 81 percent had quantifiable levels of the chemical.

The researchers also found there was a small trend among women with measurable BPA levels not to become pregnant.

Paulson doesn't think this finding is proof that BPA can affect the chances of successful in vitro fertilization.

"Most of the women had detectable levels of BPA, indicating that BPA is definitely in the circulation of women undergoing fertility treatment," he said. "However, the significance of this finding is as yet uncertain."

In another presentation, Dr. Shelley Ehrlich of the Harvard School of Public Health and colleagues found that exposure to BPA did not affect semen quality. The researchers looked at BPA levels in the semen of 71 men and evaluated the quality of the semen.

Paulson said this finding was "reassuring, although the authors do caution that the study was small, and the results should be considered preliminary."

Commenting on these two studies, Dr. Hugh S. Taylor, director of the Division of Reproductive Endocrinology and Infertility at the Yale University School of Medicine, noted that the findings didn't reach the level of statistical significance.

"This is not where I suspected to find the defects related to BPA," Taylor said. "BPA seems more powerful as a developmental toxicant," he said, referring to fetal and early childhood development.

In the third study, Dr. Lusine Aghajanova, a postdoctoral fellow at the University of California, San Francisco, exposed uterine cells obtained from healthy women to BPA in a range of doses found in the U.S. population.

"We observed that even short-term exposure of those uterine cells to BPA significantly decreases the division of cells," Aghajanova said. "Moreover, our data suggest that BPA can interfere with further development of uterine cells and the way they change in preparation for possible pregnancy."

Exposure to BPA may prevent the embryo from attaching to the uterus, Aghajanova said.

Previous animal experiments have suggested that BPA may mimic the female sex hormone estrogen. The worry has been that exposure to the chemical can cause birth defects and developmental problems in children.

Exposure to BPA also has been suspected of causing a variety of other health problems, including cancer, diabetes, obesity and attention-deficit disorder. BPA exposure can occur through direct contact with the chemical or by exposure to food or drink that has been in contact with material containing BPA.

More information

To learn more about BPA, visit the U.S. National Institute of Environmental Health Sciences.

SOURCES: Lusine Aghajanova, M.D., Ph.D., postdoctoral fellow, University of California, San Francisco; Hugh S. Taylor, M.D., director, division of reproductive endocrinology and infertility, and professor, obstetrics and gynecology, Yale University School of Medicine, New Haven, Conn.; Richard J. Paulson, M.D., professor, obstetrics and gynecology, and chief, division of reproductive endocrinology and infertility, University of Southern California Keck School of Medicine, Los Angeles; Nov. 11, 2008, presentations, American Society for Reproductive Medicine annual meeting, San Francisco

Copyright©2008 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. Primary Insomnia Tied to Brain Neurochemical Imbalance
2. Study links primary insomnia to a neurochemical abnormality in young and middle-aged adults
3. FDA Faulted for Stance on Chemical in Plastics
4. NaturalNews Posts Audio Interview with Consumer Chemical Expert Debra Lynn Dadd on Bisphenol-A
5. Researchers find new chemical key that could unlock hundreds of new antibiotics
6. Human Testing - Exposing Children to Chemicals
7. Healthy Fat Chemical Aids Bodys Metabolism
8. Sensor Detects Levels of Brain Chemicals
9. Low Levels of Brain Chemical May Control Appetite
10. Presidential medal for technological breakthroughs earned by 2 chemical engineering professors
11. Chemical liberated by leaky gut may allow HIV to infect the brain, Einstein scientists find
Post Your Comments:
Related Image:
Chemical in Plastics May Cause Fertility Problems
(Date:6/26/2016)... ... 2016 , ... Pixel Film Studios Released ProSlice Levels, a Media Slicing Effect ... videos a whole new perspective by using the title layers in ProSlice Levels ... , ProSlice Levels contains over 30 Different presets to choose from. FCPX ...
(Date:6/25/2016)... ... June 25, 2016 , ... Austin residents seeking Mohs surgery services, can ... Surgery and to Dr. Russell Peckham for medical and surgical dermatology. , Dr. Dorsey ... cancer. The selective fellowship in Mohs Micrographic Surgery completed by Dr. Dorsey was under ...
(Date:6/25/2016)... Oklahoma City, Oklahoma (PRWEB) , ... June 25, ... ... to helping both athletes and non-athletes recover from injury. Recently, he has implemented ... for the Oklahoma City area —Johnson is one of the first doctors to ...
(Date:6/24/2016)... ... June 24, 2016 , ... June 19, 2016 is World Sickle Cell ... pain and the benefits of holistic treatments, Serenity Recovery Center of Marne, ... Cell Disease. , Sickle Cell Disease (SCD) is a disorder of the red blood ...
(Date:6/24/2016)... ... ... Comfort Keepers® of San Diego, CA is excited to announce they are ... drive cancer patients to and from their cancer treatments. Comfort Keepers provides quality ... and ongoing independence. Getting to and from medical treatments is one of the ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)... 2016  Arkis BioSciences, a leading innovator in ... durable cerebrospinal fluid treatments, today announced it has ... is led by Innova Memphis, followed by Angel ... investors.  Arkis, new financing will accelerate the commercialization ... release of its in-licensed Endexo® technology. ...
(Date:6/23/2016)... Research and Markets has announced the addition of the ... report to their offering. ... failure, it replaces the function of kidneys by removing the ... the treatment helps to keep the patient body,s electrolytes such ... Increasing number of ESRD patients & substantial healthcare expenditure on ...
(Date:6/23/2016)... Research and Markets has announced ... Type (Organic Chemical (Sugar, Petrochemical, Glycerin), Inorganic Chemical), Functionality ... - Global Forecast to 2021" report to their ... global pharmaceutical excipients market is projected to reach USD ... in the forecast period 2016 to 2021. ...
Breaking Medicine Technology: