USC researchers find ozone lowers sperm counts

RANCHO MIRAGE, CA, April 19, 2002Ozone appears to be harmful to male fertility, according to Keck School of Medicine of USC researcher Rebecca Z. Sokol, M.D., a professor of obstetrics and gynecology and medicine. The high ozone levels produced in the lower atmospherethe result of the release of pollutantsseems to be linked to lower sperm counts and decreased sperm motility in otherwise healthy, fertile men.

Sokol reported on this work at the annual meeting of the Pacific Coast Reproductive Society.

She and her colleagues analyzed more than 8,000 sperm samples donated by 50 men in the Los Angeles area over a three-year period (January 1996 to December 1998), and compared them to more than 3,500 samples donated by 35 men from Northern California over the same time.

The original idea, says Sokol, was to see if there were geographic differences between the groups in terms of sperm quality. But, she says, the results were rather disappointing. "We found only minimal differences between Northern and Southern California, with only marginally higher motile sperm counts in Southern California," she reports. "And we werent even sure if those were real; there may very well have been some confounding factors."

But when she and her Keck colleagues compared the sperm data with air quality data donated by a private entrepreneur at Sonoma Technologies in Petaluma, Calif., they were startled by the pattern that emerged. "There was a significant correlation," says Sokol, "between decreases in sperm count and motility and increased ozone levels in the air, especially in Southern California."

In 2000, Sokol reported that sperm counts in general have remained virtually unchanged over the past 50 years, despite reports that the lives of men in the modern world were leading to a reduction in virility by as much as 50 percent.

This sort of epidemiology-based work is new to Sokol, who spent most of her career researching the effects of toxic

Contact: Jon Weiner
University of Southern California

Page: 1 2

Related medicine news :

1. Indiana University researchers closer to helping hearing-impaired using stem cells
2. Protein that helps skin cancer spread identified by Stanford researchers
3. US life expectancy about to decline, researchers say
4. Gene for age-related macular degeneration discovered by Yale researchers
5. Dartmouth researchers find where musical memories are stored in the brain
6. Columbia researchers receive $3 million to combat genetic killer of infants & toddlers
7. US cancer researchers launch first American-Israeli cancer conference
8. USC dental researchers develop first test for predicting cavities in children
9. Young blood revives aging muscles, Stanford researchers find
10. Uric acid may help reduce effects of spinal cord injury, Jefferson researchers find
11. Age should not be a factor in determining heart transplantation eligibility, researchers say

Post Your Comments:

(Date:7/9/2019)... ... July 09, 2019 , ... Leading healthcare ... Association of American Cancer Institutes – Clinical Research Innovation (AACI-CRI) annual meeting, held ... management and data analysis. As the leading provider of clinical research technology solutions, ...
(Date:7/9/2019)... ... July 09, 2019 , ... ... in medical marketing and communications. Covering everything from multinational holding companies to five-person ... landscape. , The 2019 version of the Agency 100 contains a full profile ...
(Date:7/9/2019)... ... July 09, 2019 , ... ... tracking technology, today announced a validated integration between the Midmark real-time locating system ... enhancing Rauland’s nurse call platform with location data since 1997 and is implemented ...
(Date:7/9/2019)... Mass. (PRWEB) , ... July 09, 2019 , ... ... components worldwide and the largest authorized distributor for JAE Electronics in North America, ... interconnect products. , The new connectors feature a 0.5mm contact pitch and 2.5mm ...
(Date:7/9/2019)... ... ... Fonolo , the leader in cloud-based call-back solutions for the contact center, ... Prepare Your Call Center for Seasonal Call Spikes: Healthcare Edition . The new publication ... of year: Open enrollment. , Open enrollment is one of the busiest and most ...
Breaking Medicine News(10 mins):
(Date:7/10/2019)... ... 10, 2019 , ... Birk Manufacturing has announced that the company will be ... 2019, the largest exhibition for the global microelectronics industry in North America. The event ... 11, 2019. Birk Manufacturing will be showcasing at booth #152. , At the ...
(Date:7/9/2019)... ... July 10, 2019 , ... ... workshop presented by Cerulean Associates LLC and FDAnews**, Oct. 21-22, 2019, Doubletree by ... Early Bird Savings: Register by Sept. 23 and Save $200 , FDA gives ...
(Date:7/9/2019)... ... July 09, 2019 , ... DHL Global Forwarding, the air ... have released a joint report on the logistical challenges and opportunities posed by ... Partnerships: The Path to Personalized Medicine in Latin America”, the report provides a ...
Breaking Medicine Technology:
Cached News: