Navigation Links
Fast-Freeze May Help Sperm Survive Storage, Study Finds
Date:9/14/2010

By Randy Dotinga
HealthDay Reporter

TUESDAY, Sept. 14 (HealthDay News) -- Researchers say they have developed a new and better method of freezing human sperm for later use in pregnancy attempts.

The new technique could potentially improve in vitro fertilization treatment and perhaps make it possible for HIV-positive men to donate sperm safely, the researchers say.

The freezing approach used in the study is already used for embryos and eggs, "and this is the next step, so it is logical," said Dr. Ian Cooke, emeritus professor of obstetrics and gynecology at the University of Sheffield in England, who is familiar with the study.

"Any improvements in sperm freezing would be welcome," said Mathew Tomlinson, a fertility specialist and scientist at Nottingham University Hospitals in England.

"We can store sperm for many years, but only 25 to 30 percent of sperm survive from even the best samples," said Tomlinson.

Among cancer patients who want their sperm stored before they undergo chemotherapy, as little as 5 percent of sperm may survive, he added.

When study lead author Raul Sanchez of La Frontera University in Chile and colleagues tested their alternative freezing approach, known as vitrification, they found that almost 80 percent of sperm remained viable after thawing.

In the traditional approach, sperm is frozen slowly and stored in liquid nitrogen. Vitrification involves removing the plasma in sperm, suspending the sperm in a sucrose solution and fast-freezing it in liquid nitrogen. It is then stored in liquid nitrogen or another kind of deep freeze.

This process results in greater sperm vitality and motility, and is less damaging to sperm, the researchers explained in a news release from the International Federation of Fertility Societies.

Because the sperm plasma -- potentially home to the virus that causes AIDS -- is extracted, the researchers think their approach may also allow HIV-positive men to donate sperm without passing on the illness to a mother or baby.

But Dr. Robert D. Oates, professor of urology at Boston University School of Medicine, said he's skeptical of the researchers' claims. The findings don't "translate directly into anything related to whether this allows better pregnancy rates," he said.

Moreover, the research doesn't prove that the freezing approach leaves the sperm free of disease, he added. "This is a technique that may have an application," Oates said, "but their claims are way overstated."

The findings are scheduled for presentation Tuesday at the World Congress on Fertility and Sterility in Munich, Germany.

More information

The U.S. National Library of Medicine has details on semen analysis, which measures the quality of sperm.

SOURCES: Ian Cooke, M.D., emeritus professor of obstetrics and gynecology, University of Sheffield, England; Mathew Tomlinson, Ph.D., consultant scientist, Nottingham University Hospitals, England; Robert D. Oates, M.D., professor of urology, Boston University School of Medicine; International Federation of Fertility Societies, news release, Sept. 14, 2010


'/>"/>
Copyright©2010 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. New Clues Shed Light on Sperm Function, Male Fertility
2. Smoking Could Harm Sperm, Study Finds
3. $2.5 Million Gift Aims to Help Children Survive and Thrive
4. Given No Chance to Survive with Pancreatic Cancer, Chicago Woman Finds New Life at Northwest Community Hospital
5. 5th Annual Brittiana 'Smile For Life' 5k run/walk - Helping Children Survive Cancer One Smile at a Time
6. SurvivetheSpill.com is Helping 100s and Wants to Make it 1000s
7. Despite Treatment, Employees with Depression Generate Higher Absentee Costs, According to Thomson Reuters Study
8. American Council on Exercise (ACE) Study Reveals Kettlebells Provide Powerful Workout in Short Amount of Time
9. TV drama can be more persuasive than news program, study finds
10. Study carried out into biological risks of eating reptiles
11. Neuroimaging study may pave way for effective Alzheimers treatments
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Fast-Freeze May Help Sperm Survive Storage, Study Finds   
(Date:10/12/2017)... ... October 12, 2017 , ... The company has ... today’s consumer and regulatory authorities worldwide. From Children’s to Adults 50+, every formula ... the highest standard. , These products are also: Gluten Free, Non-GMO, Vegan, ...
(Date:10/12/2017)... Bethesda, MD (PRWEB) , ... October 12, 2017 , ... ... Award of Excellence to Carol Friedman, PhD, FACMI, during the Opening Session of AMIA’s ... 4 – 8. , In honor of Morris F. Collen, a pioneer in the ...
(Date:10/12/2017)... , ... October 12, 2017 , ... ... delivery system that we intend to develop to enable prevention of a major ... to severe hearing loss, especially in pediatric patients. For cisplatin, hearing loss is ...
(Date:10/12/2017)... ... 12, 2017 , ... HMP , a leader in healthcare events and ... Eddie Digital Award for ‘Best B-to-B Healthcare Website.’ Winners were announced during the Eddie ... annual award competition recognizes editorial and design excellence across a range of sectors. This ...
(Date:10/12/2017)... ... October 12, 2017 , ... On Saturday, October 21, the ... – Miles by Moonlight to raise money for the American Heart Association Heart Walk. ... , Teams will work together to keep their treadmills moving for 5 hours. Treadmills ...
Breaking Medicine News(10 mins):
(Date:9/25/2017)...   Montrium , an industry leader in ... IQPC Trial Master Files & Inspection Readiness Conference ... Clinical Services has selected eTMF Connect ... EastHORN, a leading European contract research organization (CRO), ... to enable greater collaboration with sponsors, improve compliance ...
(Date:9/19/2017)... venture-backed medical device company developing a non-invasive, robotically assisted, platform therapy that uses pulsed sound ... ... Jim Bertolina, PhD ... Tom Tefft ... device executive Josh Stopek , PhD, who has led R&D and business development teams ...
(Date:9/12/2017)... 12, 2017   EcoVadis , the leading platform for environmental, social ... annual edition of its Global CSR Risk and Performance Index. The report ... based on Scorecard Ratings that analyzed nearly 800,000 data points across the ... ... ...
Breaking Medicine Technology: