Frozen, fresh sperm both effective for in vitro fertilization

ROCHESTER, Minn. -- A new Mayo Clinic study shows that couples using in vitro fertilization have the same likelihood of successful pregnancy whether the sperm used is frozen or fresh. Researchers presented the results today at the annual scientific meeting of the American Urological Association in San Francisco.

"Without these data, we were concerned that frozen sperm might reduce the birth rate," says Alan Thornhill, Ph.D., senior author of the study and director of the Mayo Clinic in vitro fertilization laboratory. "Now, we believe that concern is unwarranted."

In vitro fertilization starts with a woman taking fertility drugs to stimulate her ovaries to produce more eggs than usual. When the eggs are mature, they are retrieved from the ovary and introduced to washed sperm to allow fertilization. The availability of sperm on the day eggs are retrieved is critical to success.

Two to five days after retrieval, the embryos (the fertilized eggs) are transferred to the uterus.

How the study was done

Researchers reviewed data collected at Mayo Clinic from 1993 to 2003. Fresh sperm were used in 1,580 cycles and frozen sperm in 309 cycles. At Mayo Clinic, sperm samples are frozen as part of the in vitro process in the event that a fresh sample is not available on the required day.

Researchers compared the effectiveness of fresh vs. frozen sperm by calculating the cumulative live birth rate -- that is at least one baby born from a single egg retrieval from the mother. Embryos from a single egg retrieval may be transferred over one or more transfer cycles.

For cycles using fresh sperm, the cumulative live birth rate was 51.6 percent. For frozen, it was 53.1 percent.

Dr. Thornhill says Mayo Clinic doctors still prefer to use fresh sperm when possible because the number of sperm and their movement are reduced by freezing and thawing.

If fresh sperm is not available -- because of the man's illness,


Page: 1 2

Related medicine news :

1. Reconstituted blood is better for infants heart surgery than fresh blood
2. College freshmen more politically liberal than in the past, UCLA survey reveals
3. Study identifies genetic fingerprint of healthy sperm
4. USC researchers find ozone lowers sperm counts
5. Strategy effective against drug resistant tuberculosis
6. Study shows patch therapy may be as effective as oral medications
7. Chronic pain treatments more effective when taken together, new study shows
8. Geodon effective in psychiatric emergencies; Sharply reduces time in restraints
9. Costs of antidepressants could have funded effective alternatives
10. New ways to design safer & more effective topical (transdermal) drug delivery announced in the PNAS
11. Government wasting your taxpayer money on ineffective drug cure

Post Your Comments:

(Date:6/26/2016)... ... June 26, 2016 , ... Brent Kasmer, a legally blind and certified personal trainer is ... a fitness app. The fitness app plans to fix the two major problems leading the ... one size fits all type program , They don’t eliminate all the reasons ...
(Date:6/25/2016)... ... June 25, 2016 , ... Experts from the American Institutes ... Research Meeting June 26-28, 2016, at the Hynes Convention Center in Boston. , ... advance care planning, healthcare costs and patient and family engagement. , AIR researchers ...
(Date:6/25/2016)... ... June 25, 2016 , ... The temporary closing of Bruton Memorial Library on June ... , brings up a new, often overlooked aspect of head lice: the parasite’s ability to ... is not a common occurrence, but a necessary one in the event that lice have ...
(Date:6/25/2016)... TX (PRWEB) , ... June 25, 2016 , ... ... the United States, named Dr. Sesan Ogunleye, as the Medical Director of its new ... the facility Medical Director of our new Mesquite location,” said Dr. James M. Muzzarelli, ...
(Date:6/25/2016)... City, Oklahoma (PRWEB) , ... June 25, 2016 ... ... helping both athletes and non-athletes recover from injury. Recently, he has implemented orthobiologic ... the Oklahoma City area —Johnson is one of the first doctors to perform ...
Breaking Medicine News(10 mins):
(Date:6/23/2016)... Revolutionary technology includes multi-speaker listening to conquer ... in advanced audiology and hearing aid technology, has today ... world,s first internet connected hearing aid that opens up ...      (Photo: http://photos.prnewswire.com/prnh/20160622/382240 ) , ... , TwinLink™ - the first dual communication ...
(Date:6/23/2016)... 2016 The vast majority of dialysis patients ... Treatments are usually 3 times a week, with treatment ... travel time, equipment preparation and wait time.  This regimen ... for patients who are elderly and frail.  Many elderly ... rehabilitation centers for some duration of time. ...
(Date:6/23/2016)... 2016  Experian Health, the healthcare industry ... patient payment and care experience, today announced ... and services that will enhance the breadth ... These award-winning solutions will enable healthcare professionals ... in an ever-changing environment and redefine front-office ...
Breaking Medicine Technology:
Cached News: