Like eggs, sperm have a “best by” date?


Reader Response to “Don’t Marry Career Women” – Like eggs, sperm have a “best by” date?

Like eggs, sperm have a “best by” date?
Back2TheKitchen
Regular Contributor
Back2TheKitchen
http://seattletimes.nwsource.com/html/health/2003303295_carnalknowledge15.html

By Faye Flam

By the time I’d reached my early 30s and was still not married, someone offered me this bit of advice: Just pick somebody.

Women are relentlessly reminded of the dreaded biological clock and the risks of having children after 35. But recent science suggests men, too, should be worried.

“The term ‘biological clock’ has always referred to females, but now there’s evidence men are also ticking off some of their healthy children,” says Jay Schinfeld, a fertility specialist.

The latest finding, published last month: Older fathers are more likely to have children with autism. Researchers tracked 387,000 people born in Israel and concluded the odds of fathering an autistic child are about 6 in 1,000 for men under 20. When a man reaches 50, those odds shoot up to about 52 in 1,000.

“The optimal time for a man to father a healthy child is the same as for a woman — 25 or so,” says Dolores Malaspina, a psychiatry professor at New York University and coauthor of the study.

Malaspina led an earlier study showing a connection between paternal age and schizophrenia. She found children born to fathers over 50 carried about three times the risk of developing schizophrenia as those born to fathers in their 20s.

Autism and schizophrenia both arise from a little-understood combination of genetic and environmental triggers. Both disorders tend to run in families, suggesting that genetic risk factors can be inherited.

But you don’t have to carry a genetic disease to pass one on — the trouble can start in your testicles. There, sperm-generating cells divide about 23 times a year, in the process slowly accumulating copying errors.

Older fathers are more likely to have children with achondroplasia (dwarfism) and several other conditions caused by spelling errors in the DNA. So for a man, the older you get, the less your child’s genetic endowment will resemble your own.

For women, aging isn’t as likely to lead to spelling errors because we make no new eggs after we’re born. But that leads to other problems. The million or so we begin life with die at a rate of about 30 a day, and as the remaining eggs age, they get less adept at one of their critical jobs — dividing their 46 chromosomes in half. Eggs don’t do this until after they’re penetrated by a sperm.

If they get it wrong, some will get extra chromosomes, others will miss one, leading to Down syndrome (an extra chromosome 21), Turner’s syndrome (a missing X chromosome in a girl), and Klinefelter’s syndrome (an extra X chromosome in a boy).

Menopause creates a natural cutoff for women’s fertility around 50, while an increasing number of men much older than that are becoming fathers, or trying to, says Abington’s Schinfeld. “We get some as old as 70 coming here to try to make babies,” he says.

Some get married a second time to a younger woman and others find love late in life. Schinfeld said one of his patients, a Vietnam veteran in his 60s, came to him with a wife in her 30s. The man explained that during the war he’d rescued a group of villagers, including a little girl, and that girl tracked him down after she grew up. Despite the age difference, they fell in love and got married.

It’s hard to say whether men will now be subject to pressure the way women are, or accused of “wanting it all.”

Besides, the chances are still good that older parents can have a healthy child. And the fear of genetic defects has to be balanced with the hazard inherent in cutting short your search for a compatible mate. As a study out of Brandeis University concludes, “Spouses in poor marriages are more likely to be stressed … a finding that could mean a greater likelihood of strokes and heart disease.”

So holding out for someone wonderful can jeopardize your fertility, but the “just pick someone” strategy could kill you.

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“With women or the female mindset imparted through feminization on the vast majority of society, it will be very easy to control the Empire…I mean…the republic.” – mirrorofthesoul.blogspot.com

10-15-2006 06:55 PM

Re: Like eggs, sperm have a “best by” date?
Anti_Feminist
Regular Contributor
Anti_Feminist

their is a key difference, only some of the sperm men produce are defective not all. with the technology available it wont be difficult to tell the two apart. men can simply filter until they have a sample of their “best efforts” and vola, a normal happy teenager playing catch with his 93yo father while his 36yo mother bakes a pie!

10-15-2006 10:57 PM

Re: Like eggs, sperm have a “best by” date?
leeraconteur
Regular Contributor
leeraconteur

Another contingency is that only part of the man’s sperm are not effective; the rest work just fine until he is dead, and thus men can father children naturally until death.

Women become infertile by a cut-off date.  There is no such cut-off date for men.

Just more attempts to convince men that we are just like women.

10-16-2006 03:29 AM

Re: Like eggs, sperm have a “best by” date?
Cassius
Regular Contributor
Cassius
this is complete bogus a woman does not produce her eggs over and over, she has them and releases them the ones she releases at 40 are less fresh than the ones released at say 20. A man aways produces new sperm. So it is only natural for a man to want a younger woman with fresher eggs and milk and not a 39 year old divorce attorney.

10-16-2006 10:58 AM

Re: Like eggs, sperm have a “best by” date?
PatriarchVerlch
Regular Contributor
PatriarchVerlch

After a man is exposed to all those chemicals in what we eat and drink, no wonder!

How about an old man, and a young woman should still be able to make a perfect baby. Women who have children over 35 are way less likely to have said child reach old age. As womans cells are deteriorated. I believe older men, have older wives, and this is just more egalitarian garage. Any research done against women, with have little snot nosed feminists fainting at the thought of something not affecting men equally as horrifying.

Women have been proving for the last 30 years that men have been right for the last 30 centuries!
http://www.verlch.blogspot.com

10-16-2006 01:44 PM

Re: Like eggs, sperm have a “best by” date?
porkchops38
Regular Contributor
porkchops38
The article is simply propaganda.

Nobody knows for certain what the he11 autism is exactly, let alone what the he11 causes it.

Also, check this out, quoting from the article:

“The latest finding, published last month: Older fathers are more likely to have children with autism. Researchers tracked 387,000 people born in Israel and concluded the odds of fathering an autistic child are about 6 in 1,000 for men under 20. When a man reaches 50, those odds shoot up to about 52 in 1,000.”

Hello? The lights are on but nobody’s home! Israel? They couldn’t find another population of people whose ethnicity is closer knit, could they?

As they say, “figures lie, and liars figure.”

It’s just another propaganda piece from the matriarchy.

10-16-2006 06:40 PM

Aytism rates
HappyMom
Regular Contributor
HappyMom
Autism rates may be linked to TV viewing in toddlers

There is a large community of parents online who believe it is linked to vaccines and so they do not vaccinate their children. There is a county in my state that has the highest rates of autism, much higher than anywhere else in the state. It is also the wealthiest county by far, so perhaps it is environmental, maybe something in the water? Who knows.

I have a cousin with autism. He is in his late 30s and can only talk a little, jumps up and down in public, and other inappopriate behaviors. But he can play the piano really well. Bill Gates is also considered autistic. He has Aspbergers Syndrome. Doctors say that a person is in the “autistic spectrum” which ranges from Asperberger to far less functional conditions like my cousin and worse. Anyhow, diagnosis are way up and some say they are better at diagnosing it, others say it is just labeling otherwise quirky behaviors as pahtologies and others say there is a cause (vaccines, environmental toxins, older parents, TV watching etc.)

So basically porkchops is right, nobody knows anything about it at all.

Message Edited by HappyMom on 10-20-200611:25 AM

Message Edited by HappyMom on 10-20-200611:26 AM

10-20-2006 11:24 AM

Re: Autism rates
anniepema
Visitor
anniepema

Autism has been observed to be more prevalent in the offspring of older fathers since 1980.  The study in Israel is not the first to find the connection.  http://ebdblog.com/paternalage/

http://ageofthefatherandhealthoffuture.blogspot.com/  The number of men fathering babies 35-49 and 50 + has increased over 40%  since 1980.

03-09-2007 03:45 PM

Re: Autism rates
anniepema
Visitor
anniepema

An abstract of a study completed in Finland was just released by the National Library of Medicine, Pub Med.

It compared 900 special ed kids and 301 mainstream kids and found that the greatest risk factor for spec ed and neurological disabilities was a paternal age of 40 and above.

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=pubmed&cmd=Retrieve&dopt=AbstractPlus&list_uids=17346999&query_hl=1&itool=pubmed_docsum

03-11-2007 11:01 PM

Re: Like eggs, sperm have a “best by” date?
anniepema
Visitor
anniepema

Wouldn’t the next step in the research of the Cold Spring Harbor Laboratories be to test the sperm and ancestral sperm making cells of the father’s of all the autistic and control normal families for Copy Number Variations?  Sporadic autism comes from somewhere and the logical place to look is in sperm.http://www.the-scientist.com/news/home/52940/

http://www.sciencedaily.com/releases/2002/10/021018080014.htm

03-17-2007 11:12 AM

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