HOME >> MEDICINE >> NEWS
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,
'"/>


12-May-2004


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:
*Name:
*Comment:
*Email:


(Date:8/31/2020)... ... August 31, 2020 , ... Dr. Chang has ... with autism and other developmental disabilities, as well as supporting staff in caring ... with autism, school consultation, and staff development. She joined the company in 2015 ...
(Date:8/28/2020)... ... 28, 2020 , ... Ernst & Young LLP (EY US) ... Of The Year® 2020 Florida Award finalist. Now in its 34th year, the ... growth and prosperity as they build and sustain successful businesses that transform our ...
(Date:8/28/2020)... ... August 28, 2020 , ... ... set out to continue helping the specialty-diet community connect with great, gluten-free ... products, get coupons, enter giveaways, chat with brands & watch over 50 educational ...
(Date:8/28/2020)... ... August 28, 2020 , ... A ... suggest that obese individuals are at an increased risk of developing severe COVID-19 ... to catch COVID-19; however, because the same organ systems that the coronavirus attacks ...
(Date:8/27/2020)... (PRWEB) , ... August 27, 2020 , ... ... to partner with Evolution Labs to provide their students with Suite360:Mental Health and ... to Mental Health, Substance Abuse and Child Trafficking Prevention. , Florida schools and ...
Breaking Medicine News(10 mins):
(Date:9/3/2020)... ... 2020 , ... In response to the COVID-19 pandemic and ... across the United States, IntraLogic Solutions , a leading national school security ... non-contact, wall-mounted scanning thermometer that rapidly checks body temperatures. When a level exceeds ...
(Date:9/1/2020)... ... September 01, 2020 , ... Agilent, a global ... Agilent Science and Technology Virtual Symposium 2020 (ASTVS 2020) on September 10-11, ... suite of Live webinars and Networking sessions, with a vast array of on-demand ...
(Date:9/1/2020)... ... ... Breast and ovarian cancers are common diseases that affect many women. According ... women per year) and 10% of ovarian cancers (about 2,000 women per year) result ... in the Women’s Excellence Genetic Testing Program. , Dr. Jonathan Zaidan, MD, FACOG, President ...
Breaking Medicine Technology:
Cached News: