Navigation Links
Sonicating sperm -- the future of male contraception
Date:1/29/2012

The ideal male contraceptive would be inexpensive, reliable, and reversible. It would need to be long acting but have few side effects. New research published in BioMed Central's open access journal Reproductive Biology and Endocrinology used commercially available therapeutic ultrasound equipment to reduce sperm counts of male rats to levels which would result in infertility in humans.

Ultrasound's potential as a male contraceptive was first reported nearly 40 years ago. However the equipment used is now outdated and no longer available. Researchers from the Department of Pediatrics at the University of North Carolina School of Medicine used these experiments as a starting point to see if modern ultrasound equipment usually used for physical therapy could be used as a male contraceptive.

The team led by James Tsuruta found that by rotating high frequency (3MHz) ultrasound around the testes they were able to cause uniform depletion of germ cells throughout the testes. The best results were seen using two sessions consisting of 15 minutes ultrasound, two days apart. Saline was used to provide conduction between the ultrasound transducer and skin, and the testes were warmed to 37 degrees centigrade. Together this reduced sperm to a Sperm Count Index of zero (3 million motile sperm per cauda epididymis).

The World Health Organization has defined oligospermia (low sperm concentration) as less than 15 million sperm per ml. Dr Tsuruta explained, "Unlike humans, rats remain fertile even with extremely low sperm counts. However, our non-invasive ultrasound treatment reduced sperm reserves in rats far below levels normally seen in fertile men (95% of fertile men have more than 39 million sperm in their ejaculate). However further studies are required to determine how long the contraceptive effect lasts and if it is safe to use multiple times."


'/>"/>

Contact: Dr. Hilary Glover
hilary.glover@biomedcentral.com
44-203-192-2370
BioMed Central
Source:Eurekalert

Page: 1

Related biology news :

1. Low sperm count may be associated with prenatal testosterone excess
2. Proteins in sperm unlock understanding of male infertility says new study
3. The more promiscuous the female, the speedier the sperm
4. CSHL scientists discover how companion cells to sperm protect them from genetic damage
5. The egg makes sure that sperm dont get too old
6. Spread your sperm the smart way
7. ESHREs workshop on freezing of human sperm, eggs and embryos in Athens
8. MMS and NOAA scientists study prey of Gulf of Mexico sperm whales
9. Molecular study could push back angiosperm origins
10. Females shut down male-male sperm competition in leafcutter ants
11. UT Southwestern researchers use novel sperm stem-cell technique to produce genetically modified rats
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/30/2015)... 2015 To bolster its efforts and commitment to ... today the addition of two new team members. ... and David Raviv will act as head of ... commitment to providing the most secure solutions for the enterprise ... Layer 7 Technologies, a provider of security and management products, ...
(Date:6/29/2015)... 24, 2015 Research and ... "Latin America Biomedical Sensors Market - Growth, Trends ... The Latin America Biomedical Sensors market is estimated ... 2.04% over the period 2014-2020 The near ... the genetic formulation of each individual. These sensors can ...
(Date:6/25/2015)... , June 25, 2015 ... Sensors Market by Type (Swipe & Area), Technology, Material ... Government, Healthcare, Commercial Security & Others) & Geography ... by marketsandmarkets, the said market is expected to ... of 17.1%. Browse 76 market ...
Breaking Biology News(10 mins):HYPR Corp. Expands Biometric Authentication Team with Enterprise All Stars 2HYPR Corp. Expands Biometric Authentication Team with Enterprise All Stars 3Latin America Biomedical Sensors Market Report 2015-2020 2Fingerprint Sensors Market Worth $14,500.07 Million by 2020 2Fingerprint Sensors Market Worth $14,500.07 Million by 2020 3Fingerprint Sensors Market Worth $14,500.07 Million by 2020 4
... A team of researchers, led by biologists at Dartmouth, ... in Lake Baiyangdian, the largest lake in the North ... drinking water for the people who live around it. ... Lake Baiyangdian, all at varying distances from major sources ...
... Is getting new knees on your list of New ... indicates that women wait longer to pursue knee-replacement surgery ... can no longer stand the pain, these women may ... on hold indefinitely, according to Lynn Snyder-Mackler, Distinguished Alumni ...
... If youre worried about high cholesterol levels and keeping ... and eggs just yet. A new study says they ... University have discovered that lower cholesterol levels can actually ... assistant professor of health and kinesiology, and Simon Sheather, ...
Cached Biology News:Dartmouth researchers alarmed by levels of mercury and arsenic in Chinese freshwater ecosystem 2Listen-up ladies: Don't postpone knee-replacement surgery 2Listen-up ladies: Don't postpone knee-replacement surgery 3Surprise -- cholesterol may actually pose benefits, study shows 2
(Date:8/3/2015)... ... August 03, 2015 , ... Sterlitech Corporation ... its comprehensive line of analytical laboratory equipment. With optimized features, such as PTFE-coated ... a chemically resistant and maintenance-free solution for a broad range of vacuum filtration ...
(Date:7/31/2015)... ... 2015 , ... Global Resorcinol Market 2015-2019 is a comprehensive ... global resorcinol industry. The report highlights the various growth prospects and the prevalent ... of primary and secondary inputs from the existing players of the resorcinol market. ...
(Date:7/31/2015)... ... July 31, 2015 , ... R-Biopharm is proud ... partially hydrolyzed gluten in foods, has been accepted by AOAC International as Official ... Gluten in Fermented Cereal-Based Products by R5 Competitive ELISA,” based on a specific ...
(Date:7/30/2015)... AACC welcomed thousands of medical professionals ... Meeting & Clinical Lab Expo in ... showcased revolutionary advancements in clinical testing technology and ... to diagnose patients quickly and accurately and make ... As of Wednesday, July 29, more than ...
Breaking Biology Technology:Sterlitech Launches New Line of Vacuum Pumps 2Resorcinol Market to Grow at 6% CAGR to 2019 Says New Research Report at ReportsnReports.com 2Resorcinol Market to Grow at 6% CAGR to 2019 Says New Research Report at ReportsnReports.com 3Resorcinol Market to Grow at 6% CAGR to 2019 Says New Research Report at ReportsnReports.com 4RIDASCREEN® Competitve Gliadin Receives AOAC Official First Action Status 2Innovative Research on Cancer, Heart Disease, and Infectious Diseases Draws More than 17,500 Attendees to 2015 AACC Annual Meeting 2Innovative Research on Cancer, Heart Disease, and Infectious Diseases Draws More than 17,500 Attendees to 2015 AACC Annual Meeting 3Innovative Research on Cancer, Heart Disease, and Infectious Diseases Draws More than 17,500 Attendees to 2015 AACC Annual Meeting 4
... point to accelerated growth in China ,s domestic market:  rising corporate ... government policy continues to urge greater consumption of goods.  At Philadelphia,s Cira ... executives and managers can learn how to get into the game at ... , , ...
... unique device based on sniffing inhaling and exhaling ... to navigate wheelchairs or communicate with their loved ones. ... to create a sort of ,third hand, to assist ... Sobel, electronics engineers Dr. Anton Plotkin and Aharon Weissbrod ...
... , PHILADELPHIA - Collaboration by chemists, physicists and ... created a simple and inexpensive method to rapidly ... BNSLs, by crystallizing a mixture of nanocrystals on ... new and spontaneous way to grow long-range-ordered BNSL ...
Cached Biology Technology:Orchestrall Sponsors 'China Business Toolbox': Brings Focus to the 'How and When' of China Market Access 2Orchestrall Sponsors 'China Business Toolbox': Brings Focus to the 'How and When' of China Market Access 3New invention at the Weizmann Institute 2New invention at the Weizmann Institute 3Penn collaboration leads to simpler method for building varieties of nanocrystal superlattices 2Penn collaboration leads to simpler method for building varieties of nanocrystal superlattices 3
... ScriptCap™ m7G Capping system ... and all of the components ... 0 on the end of ... These kits feature high efficiency ...
... Detergent Removal , , ... no cross-reactivity with other proteins , Simple, ... Economical new surface technology, not based ... interfere with protein analysis. SurfactAway offers a ...
SDS-OutT SDS Precipitation Reagent...
... for fully automated systems for a broad ... configured for applications ranging from compound logistics, ... loop screening, which means it has fully ... picking and follow up studies all at ...
Biology Products: