 |
|
|
|
August 18th, 2011
07:30 AM ET
Modern life rough on menDidn’t men use to be more masculine? They were more ready to fight back, right? They walked with more swagger, and just did more things their way. Researchers can’t measure swagger – but they can measure testosterone, the male sex hormone most responsible for masculine behaviors – and studies show that testosterone levels in men have been on the decline for decades. Two major studies have confirmed the phenomenon, one in U.S. men and another in Danish men. In the U.S. study, the total testosterone levels measured in men’s blood dropped approximately 22% between 1987 and 2004. Of course testosterone levels drop as men get older, but what makes the study shocking is that men today actually have less testosterone than men used to have at the same age. The challenges to men’s health may not be limited to testosterone levels. The amount of sperm in ejaculated semen may be falling too. A 1992 Danish analysis of sperm quality from other studies concluded that sperm quality has been dropping for decades, and a 1997 reanalysis using different mathematical modeling confirmed the decline, estimating a drop in sperm levels of about 1.5% per year in the United States. But researchers have been gathering new data since 1996, this time using semen from Danish 18-year olds testing for military service. That data shows no such decline at all. Oddly, the results have not been published in a peer-reviewed journal, but were instead released early to the Danish government, which then published them online. If there’s strong evidence that testosterone is dropping, and the jury is still out on the decline of sperm, what other health challenges are men facing? Male sex organ malformations are certainly among them. Hypospadias for example, a condition in which the man’s urethra opens somewhere before the tip of the penis, nearly doubled in prevalence from 1970 to 1993 according to national Birth Defects Monitoring Program. Another study found that the percentage of babies in neonatal intensive care units with hypospadias jumped from just .4% in 1987 to 4% in 2000. Boys also suffer higher rates of once-rare disorders like ADHD and autism. A comprehensive study of South Korean schoolchildren published earlier this year estimates 3.74% of all boys in that country have some form of autism, compared to 1.74% of girls. To top it all off: there’s evidence that the percentage of babies born male is declining. In the general population the difference is slight, but statistically relevant. One group of epidemiologists found that in the United States, the percentage of Caucasian babies born male decreased from 51.43% in 1970 to 51.22% in 2002. That’s equivalent to about 21 fewer men per 10,000 births. In some populations, the drop is far more significant. A group of Native Americans – the Chippewas of Aamjiwnaang – live on a reserve surrounded by large industrial chemical plants in Ontario, Canada. The percentage of male births there dropped from a normal rate of 55.1% in the years 1989-1993 to just 34.8% in the years 1999-2003. Why is this happening? Many researchers cited here mention changes in our environment, like an increase in the number of chemicals we’re exposed to in the womb, and throughout life. Precisely how it all happens though is somewhat outside our scientific understanding, and of course something like testosterone levels affects each man very differently. “Two men of the same age may have exactly the same testosterone level but feel very different physically, emotionally, and sexually,” says Ian Kerner, CNN’s sex counselor. “I try to work with men to re-define sex in a way that works with their situation.” What is clear is that for whatever reason – men are taking some big biological punches from modern life. soundoff (873 Responses)« Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Next »Leave a Reply to RV Repair Shop Near My Location
Next entry »Tri Challenge: Life as a triathlete
« Previous entryAsking the right questions about health care
|
  About this blog
Get a behind-the-scenes look at the latest stories from CNN Chief Medical Correspondent, Dr. Sanjay Gupta, Senior Medical Correspondent Elizabeth Cohen and the CNN Medical Unit producers. They'll share news and views on health and medical trends - info that will help you take better care of yourself and the people you love.
 |
|
|
|
I blog frequently and I genuinely thank you for your information. The article has truly peaked my interest. I'm going to take a note of your site and keep checking for new details about once per week. I subscribed to your RSS feed too.
http://www.kidsarecooking.com/__media__/js/netsoltrademark.php?d=boxtruckrepairshop.com
I'm extremely pleased to discover this web site. I want to to thank you for your time just for this fantastic read!! I definitely liked every part of it and I have you book marked to see new stuff on your site.
http://hardwx.com/__media__/js/netsoltrademark.php?d=ocrvfleetservices.com
http://personalprotectionsuits.com/__media__/js/netsoltrademark.php?d=menmastermind.com
This page truly has all of the info I needed concerning this subject and didnít know who to ask.
http://www.logopro.co.nz/ra.asp?url=http://mastermindformen.com/
Pretty! This has been an incredibly wonderful article. Thanks for supplying these details.
http://906090.4-germany.de/tools/klick.php?curl=https://www.ocrvfleetservices.com
It's going to be finish of mine day, except before end I am reading this great post to increase my experience.
You are so cool! I do not believe I've truly read something like this before. So great to discover another person with a few original thoughts on this subject. Really.. many thanks for starting this up. This web site is one thing that's needed on the web, someone with a bit of originality!
http://www.alqlist.com/Click_Counter.asp?URL=http://ocrvcenter.com/
http://aty.k-m-meatco.com/__media__/js/netsoltrademark.php?d=www.backbonehunters.com
Very good blog post. I absolutely love this site. Stick with it!
http://valwide.com/__media__/js/netsoltrademark.php?d=consciousgrowthmarketing.com
I seriously love your website.. Pleasant colors & theme. Did you make this website yourself? Please reply back as Iím trying to create my own personal website and would love to find out where you got this from or just what the theme is called. Appreciate it!
http://desertfox.info/__media__/js/netsoltrademark.php?d=ocrvcenter.com
http://www.salmanbenhamad.cc/__media__/js/netsoltrademark.php?d=consciousgrowthmarketing.com/
http://www.kanazawa-navi.com/navi/rank.cgi?mode=link&id=725&url=https://backbonehunters.com
I know this if off topic but I'm looking into starting my own blog and was curious what all is required to get setup?
I'm assuming having a blog like yours would cost
a pretty penny? I'm not very internet savvy so I'm
not 100% positive. Any recommendations or advice would be greatly appreciated.
Many thanks
http://www.leadingplasticsurgeons.com/__media__/js/netsoltrademark.php?d=ocrvcenter.com
I couldn't refrain from commenting. Well written!
What's up friends, its impressive post regarding educationand fully explained, keep it up all the time.
http://nfp-advisor.info/__media__/js/netsoltrademark.php?d=consciousgrowthmarketing.com
An outstanding share! I've just forwarded this onto a coworker who had been conducting a little homework on this. And he actually bought me breakfast because I discovered it for him... lol. So let me reword this.... Thank YOU for the meal!! But yeah, thanks for spending time to discuss this issue here on your web site.
https://www.easytravel.com.tw/ehotel/hotel_sale.aspx?posvn=maple&url=https://consciousgrowthmarketing.com/
http://planeandpilot.com/__media__/js/netsoltrademark.php?d=consciousgrowthmarketing.com/
http://daniella.com/__media__/js/netsoltrademark.php?d=ocrvmotorsports.com/
Hi there! I simply want to offer you a huge thumbs up for your excellent info you have got right here on this post. I'll be coming back to your blog for more soon.
https://hr.bjx.com.cn/go.aspx?u=www.orangecountyrvrepair.com/
http://www.netfaqs.com/linux/Mail/Opera7/New/Index.asp?bisp=reviewnearme.com
This page really has all the information I needed about this subject and didnít know who to ask.
http://classifried.com/__media__/js/netsoltrademark.php?d=www.ocrvcenter.net/
http://crusade-sa.com/__media__/js/netsoltrademark.php?d=ocrv.xyz
http://www.jdpsbk12.org/__media__/js/netsoltrademark.php?d=ocrvart.com
I like it when folks come together and share ideas. Great website, keep it up!
http://duketheater.org/__media__/js/netsoltrademark.php?d=zealouslifestyle.com/
https://www.htcdev.com/?URL=https://ocrvcenter.net/
http://dlab.com/__media__/js/netsoltrademark.php?d=reviewnearme.com
You are so interesting! I do not suppose I have read through a single thing like this before. So great to discover somebody with some genuine thoughts on this topic. Really.. thank you for starting this up. This web site is something that is required on the internet, someone with a bit of originality!
http://pakalawai.org/__media__/js/netsoltrademark.php?d=zealouslifestyle.com
http://loftcleaning.com/__media__/js/netsoltrademark.php?d=reviewnearme.com
https://www.ladygamer.jp/ws/rank.cgi?mode=link&id=299&url=https://masternearme.com/
Great blog you have here.. It's difficult to find good quality writing like
yours nowadays. I truly appreciate individuals like you!
Take care!!
https://www.chinaso.com/big5/ocrvcenter.com/
http://www.s-angels.com/mkr/out.cgi?id=04877&go=https://ocrvcenter.com/
https://www.globalbx.com/track/track.asp?ref=GBXBlP&rurl=www.ocrvcenter.com
https://domaindirectory.com/policypage/privacypolicy?domain=Www.ocrvcenter.com
http://www.netsolhost.com/__media__/js/netsoltrademark.php?d=ocrvcenter.com/
https://freado.com/trackviews.php?action=buy&bookid=16477&buylink=https://www.ocrvcenter.com
This is the perfect web site for everyone who hopes to understand this topic. You realize a whole lot its almost hard to argue with you (not that I personally will need toÖHaHa). You certainly put a new spin on a subject that has been discussed for many years. Wonderful stuff, just excellent!
https://www.contractorsupplymagazine.com/tracking/tracking_link.php?e=info@dpxsystems.com&s=688&u=3576&a=724&r=ocrvcenter.com
http://www.ics.org/Wasabi/Common/Logout.aspx?Returnurl=ocrvcenter.com
Spot on with this write-up, I actually think this site needs a lot more attention. Iíll probably be back again to read through more, thanks for the information!
http://action.smartgrowthamerica.org/salsa/track.jsp?key=-1&url_num=6&url=https://andy8h0d7.humor-blog.com
Hi would you mind stating which blog platform you're working
with? I'm looking to start my own blog in the near future but
I'm having a tough time choosing between BlogEngine/Wordpress/B2evolution and
Drupal. The reason I ask is because your design seems different then most blogs and I'm looking
for something unique. P.S Sorry for getting off-topic but I
had to ask!
The next time I read a blog, Hopefully it doesn't disappoint me as much as this particular one. After all, Yes, it was my choice to read through, nonetheless I genuinely thought you would probably have something interesting to say. All I hear is a bunch of whining about something that you could possibly fix if you were not too busy looking for attention.
http://tours.imagemaker360.com/Viewer/Feature/Schools.asp?URL=http://bindannmalveg.de/
You have made some really good points there. I checked on the internet for additional information about the issue and found most individuals will go along with your views on this web site.
/
http://webgozar.com/feedreader/redirect.aspx?url=https://bestlocalnearme.com/
This is a topic that is close to my heart... Many thanks! Exactly where are your contact details though?
https://d.agkn.com/pixel/2389/?che=2979434297&col=22204979,1565515,238211572,435508400,111277757&l1=https://www.fortunearrt.com
Oh my goodness! Impressive article dude! Thank you so much, However I am going through issues with your RSS. I donít understand the reason why I am unable to join it. Is there anybody else having the same RSS problems? Anyone that knows the answer will you kindly respond? Thanx!!
/
https://www.sunzu.com/link/?url=fleetvehiclerepairshop.com
https://slides.virtualpathology.leeds.ac.uk/research_4/slide_library/r_bishop_collection/card_index_set/soft_tissue/33959.svs/view.apml?returnurl=http://www.greentechco.com/
http://engine.pitchengine.com/v1/util/link?c=PitchLink&a=/v1/pitches/e829965b-ded0-4c0a-9ffe-757942058364&v=http://www.laviemodernfurniture.com/&l=http://ocrvmotorsports.co/