Navigation Links
Chromosomal abnormalities in sperm higher after vasectomy reversal

Men who have had a vasectomy reversed have a very much greater rate of chromosomal abnormalities in their sperm than do normal fertile men, a scientist told the 22nd annual conference of the European Society of Human Reproduction and Embryology in Prague, Czech Republic on Wednesday 21 June 2006. Professor Nares Sukchareon, of the Department of Obstetrics and Gynaecology, Chulalongkorn University, Bangkok, Thailand, said that doctors needed to be aware of this problem and monitor carefully children born as a result, particularly if ART was involved.

Professor Sukchareon and his team had been studying men with obstructive azoospermia, a condition where sperm are created but cannot be mixed with the ejaculatory fluid due to a physical obstruction (such as a vasectomy). He found that they had high rates of chromosomal aneuploidy (where an abnormal number of specific chromosomes or chromosome sets exist within the nucleus of the cell) and diploidy (containing two sets of chromosomes ?unlike most cells in the body, the sex cells should only contain one set of chromosomes.

"The rate of abnormality was about 10 times higher than the aneuploidy and diploidy rate in normal fertile men", said Professor Sukchareon. "This raised a lot of questions, so we decided to study the rates of these abnormalities in ejaculated sperm after vasectomy reversal. If these sperm continued to have a high rate of aneuploidy and diploidy, we would know that obstruction by vasectomy must affect spermatogenesis in the longer term."

The scientists found a significant correlation between the duration of the obstruction in post vasectomy-reversal men and the number of abnormal sperm, and also between the time interval after vasectomy reversal and the total sex chromosome aneuploidy rate ?i.e. the long ago the reversal the better the chances of producing normal sperm.

"This study raises a lot of questions", said Professor Sukcharoen. "Is the abnormal spermato
'"/>

Source:European Society for Human Reproduction and Embryology


Page: 1 2

Related biology news :

1. Chromosomal microarray analysis proves accurate
2. North & South American researchers find architectural abnormalities in T. cruzi ribosome
3. Environmental chemical cocktail may sabotage sperm
4. Human embryonic stem cells have the potential to develop into eggs and sperm in the laboratory
5. UK sperm donor crisis
6. Protein translation in sperm
7. How sperm crack the whip
8. Ecologists home in on how sperm whales find their prey
9. Study links high levels of nitric oxide to infertility and sperm DNA damage
10. Even when faint, ovary scent draws sperm cells
11. Single molecular mark seen as pivotal for genome compaction in spores and sperm
Post Your Comments:
(Date:7/21/2015)... 2015 Passwords have proven futile for ... recent U.S. Office of Personnel Management breach. Biometric ... conundrum, but developers and end-users are concerned about ... dilemma, Biometrics-as-a-Service provider HYPR Corp. announced today the ... third party integration. A video ...
(Date:7/13/2015)... SAN JOSE, Calif. , July 13, 2015 ... the leading developer of human interface solutions, today ... second generation touch and display driver integration (TDDI) ... solution is the first to combine Synaptics , ... expertise with proven display driver technology developed in ...
(Date:7/9/2015)... 9, 2015  Synaptics Inc. (NASDAQ: SYNA ), a ... it will report financial results for the fourth quarter ... after the close of market. The company will host ... 2:00 p.m. PT (5:00 p.m. ET), during which management ... on the live call, analysts and investors should dial ...
Breaking Biology News(10 mins):HYPR Corp. Launches Industry First Biometric Tokenization Platform 2HYPR Corp. Launches Industry First Biometric Tokenization Platform 3HYPR Corp. Launches Industry First Biometric Tokenization Platform 4Synaptics Announces Sampling of Second Generation TDDI Solutions 2Synaptics Announces Sampling of Second Generation TDDI Solutions 3Synaptics to Report Fourth Quarter, Fiscal Year 2015 Results on July 30 2
... CORVALLIS, Ore. A new review suggests that omega-3 fatty ... certain situations, and that dietary standards based on the best ... a slam dunk a few years ago may not be ... professor in OSU,s College of Public Health and Human Sciences ...
... usually brings to mind vivid images of shattered concrete ... the result of violent hurricanes, massive earthquakes, or rampaging ... natural disaster in U.S. history ravaged the Midwest in ... of this disaster? Water scarcity. Drought during this period ...
... With Halloween just a few days away, millions are flocking ... of terror. The latest video from the American Chemical Society,s ... sense of fear. The episode is available now at ... anticipation of possible harm We know that the body is ...
Cached Biology News:Excess omega-3 fatty acids could lead to negative health effects 2Excess omega-3 fatty acids could lead to negative health effects 3New book addresses consequences of drought in arid regions 2New book addresses consequences of drought in arid regions 3
(Date:7/29/2015)... 29, 2015  HealthSouth Corporation (NYSE: ... of post-acute healthcare services, offering both facility-based and ... operations for the second quarter ended June 30, 2015. ... by strong volume growth in both segments and ... Jay Grinney, President and Chief Executive Officer of ...
(Date:7/29/2015)... Inc., an early stage biotech startup based on perinatal ... the Musculoskeletal Transplant Foundation of Edison NJ ... round of development of the proprietary AmnioCept™ product line ... AmnioChor,s technology allows cryopreservation of the amniotic membrane of ... those tissues. Amnion is a well-established source of multipotent ...
(Date:7/29/2015)... VANCOUVER , July 29, 2015 /PRNewswire/ - RepliCel ... clinical stage regenerative medicine company, is pleased to announce ... dermal injector (RCI-02) have been locked.  Prototypes for ... to prepare for an application for CE mark ... Europe in 2016. (Photo: ...
(Date:7/29/2015)... TX (PRWEB) , ... July 29, 2015 , ... Costello ... new levee system to protect the Orange County, Texas area from future storm ... multi-firm design team in determining several potential levee alignment alternatives for providing protection, Costello ...
Breaking Biology Technology:HealthSouth Reports Results for Second Quarter 2015 2HealthSouth Reports Results for Second Quarter 2015 3HealthSouth Reports Results for Second Quarter 2015 4HealthSouth Reports Results for Second Quarter 2015 5HealthSouth Reports Results for Second Quarter 2015 6HealthSouth Reports Results for Second Quarter 2015 7HealthSouth Reports Results for Second Quarter 2015 8HealthSouth Reports Results for Second Quarter 2015 9HealthSouth Reports Results for Second Quarter 2015 10HealthSouth Reports Results for Second Quarter 2015 11HealthSouth Reports Results for Second Quarter 2015 12HealthSouth Reports Results for Second Quarter 2015 13HealthSouth Reports Results for Second Quarter 2015 14HealthSouth Reports Results for Second Quarter 2015 15HealthSouth Reports Results for Second Quarter 2015 16HealthSouth Reports Results for Second Quarter 2015 17HealthSouth Reports Results for Second Quarter 2015 18HealthSouth Reports Results for Second Quarter 2015 19HealthSouth Reports Results for Second Quarter 2015 20HealthSouth Reports Results for Second Quarter 2015 21HealthSouth Reports Results for Second Quarter 2015 22HealthSouth Reports Results for Second Quarter 2015 23HealthSouth Reports Results for Second Quarter 2015 24HealthSouth Reports Results for Second Quarter 2015 25HealthSouth Reports Results for Second Quarter 2015 26HealthSouth Reports Results for Second Quarter 2015 27HealthSouth Reports Results for Second Quarter 2015 28HealthSouth Reports Results for Second Quarter 2015 29HealthSouth Reports Results for Second Quarter 2015 30HealthSouth Reports Results for Second Quarter 2015 31HealthSouth Reports Results for Second Quarter 2015 32HealthSouth Reports Results for Second Quarter 2015 33HealthSouth Reports Results for Second Quarter 2015 34HealthSouth Reports Results for Second Quarter 2015 35HealthSouth Reports Results for Second Quarter 2015 36
... now market product to poultry, red meat and pork processing ... ... N.J., May 19 Tasker Products Corp.,(OTC Bulletin Board: TKER), a ... announced,that it has received authorization from the Food Safety and Inspection,Service ...
... HALO System Demonstrated for, Eradicating Barrett,s Esophagus and ... May 19 Booth #2349 -- Digestive Disease ... the design and manufacture,of medical devices for digestive ... entitled, "A Randomized, Multicenter, Sham-Controlled,Trial of Radiofrequency Ablation ...
... PACS and Practice Management Software Adds ... Philips Ultrasound with Acquisition, ... Systems, a,leading developer of digital radiography (DR), PACS (Picture ... care practices, announced it has completed its acquisition of,Ultrasource, ...
Cached Biology Technology:Tasker Products Receives Authorization from USDA for its Tasker Clear for use in Meat and Pork Industries 2Tasker Products Receives Authorization from USDA for its Tasker Clear for use in Meat and Pork Industries 3Presentation of Landmark Clinical Trial Evaluating Endoscopic Treatment for Pre-cancerous Condition of Esophagus 2Presentation of Landmark Clinical Trial Evaluating Endoscopic Treatment for Pre-cancerous Condition of Esophagus 3Eklin Announces Acquisition of Ultrasource, Inc. 2Eklin Announces Acquisition of Ultrasource, Inc. 3
versican (H-56)...
... degrades single-stranded DNA and RNA endonucleolytically ... acids (DNA:DNA, DNA:RNA or RNA:RNA) are ... high concentrations of enzyme (1). The ... termini from double-stranded DNA (2), for ...
... catalyzes the transfer of the ... 5-terminus of polynucleotides or to ... The enzyme, purified from recombinant ... to phosphorylate RNA, DNA and ...
... verticillus USBio Analyzed PRODUCT SPECIFICATIONS Form: White powder Assay: 1.5 ... units/ml): 4.5 to 6.0 Loss On Drying: less than or ... 0.1% Bleomycin Content: A 2 : 55 - 70% B ... : greater than or equal to 90% B 4 : ...
Biology Products: