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.
Sara Lee | EurekAlert!
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Faster and secure data communication: This is the goal of a new joint project involving physicists from the University of Würzburg. The German Federal Ministry of Education and Research funds the project with 14.8 million euro.
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On Saturday, 10 November 2018, the research icebreaker Polarstern will leave its homeport of Bremerhaven, bound for Cape Town, South Africa.
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