The Sex Files
Using a simple test could boost the chance of pregnancy by 20 to 30 percent

Human Sperm and Egg Cells

So much for the idea that the faster swimmer wins. Speed is no longer enough to cut it when it comes to sperm. From here on out, the little guys may be subjected to quality control as well. Scientists have developed a simple test that separates top-notch sperm from sperm with damaged DNA, reports LiveScience.

In a study appearing in the June/July issue of the Journal of Andrology, a group at Yale Medical School found that sperm screened with their test boosts the chances of pregnancy by 20 to 30 percent. And pregnancies that result from screened sperm may have a lower rate of genetic disorders and miscarriage.

To develop the test, the scientists let sperm loose near hyaluronic acid, a chemical found in the membrane of human eggs. The sperm that bound with the acid were then analyzed and found to have healthy DNA chains. Those that didn’t were more likely to be damaged, or what one of the researchers compares to “scratched CDs”.

The new procedure could change thinking about male fertility, turning focus away from quantity to the quality of a man’s sperm. Instead of just focusing on sperm count, doctors may also pore over semen samples in search of a few superior sperm.

The test may also prove crucial during in-vitro fertilization, where doctors sometimes inject a single sperm into an egg – and a swimming competition is out of the question.

Mara Hvistendahl is writing The X-Y Problem, a book on reproductive technology, sex selection, and gender imbalance.

9 Comments

excellent, one more step to artificial improvement of the human race, something we desperately need. just combine this with artificially modified genes and...super-humans here we come!

What a double-edged sword. On the one hand this is great because it can reduce people who have disabilities and mental illnesses. On the other hand, this just takes us one step closer to engineering future generations, which could be very good, or very bad. Should we really control our genetic offspring?

Either way, past writers like Aldous Huxley dreamed of this type of technology decades ago. Most sci-fi will one day be true, in one way or another.

@ Albeezzy
If you're referring to brave new world by Huxley, that was meant as a dystopian novel, more like had nightmares about it... That being said, I think that it's a good thing to have improved In-vitro pregnancy rates but as far as genetic changes go.... eliminate diseases, sure no problem, but changing the appearance or ability involves modifying a human being's dna without cause or his or her consent. Sure, modify it with their consent no problem but imagine how you would feel if you knew your DNA was modified before you were born, thinking about what you may have been otherwise... It would be hard but not impossible to modify dna after maturity, perhaps with nanobots...

OH Great! What are we going to do if we can't produce politicians?

do we need a technique to increase fertility rates? the planet is over populated as it is.

For your next discovery are you gonna find a way to make the Sahara desert more arid and hot...

Jefro made me lol

jefro, someone clearly had screened the sperm that created you. That's the funniest comment I can remember. You definitely got the wit gene.

Take a moment to imagine just a couple small consequences to genetic medication…

Starting with the obvious medical standpoint we are faced with the near eradication of disease either through correction of defunct gene sequences or better immune system response after the initial infection.

Moving onto a more societal perspective what would it be like to live in a world were every persons genes are screened to make sure they are intelligent enough to see what a drain on the general public they are, forgetting for a moment that everyone would not only be bright enough to see a solution to any problem that might have placed them in that situation but would also maintain an innate desire/motivation to better themselves and their surroundings instead of dealing with constant emotional turmoil and self-doubt.

I don’t care to take the time to extrapolate further but why don’t we work on our ability to efficiently manipulate genetic material and discuss the ethical implications when everyone is quick enough to keep up with the debate.

This is perfect. Keep on exploring in this realm, and we will all but eliminate birth defects, disabilities and mental illness.

Before this can happen though, we need to know where to draw the line.



June 2013: American Energy Independence

Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.


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