Animal Study: Stress might induce human infertility

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	Animal Study: Stress might induce human infertility

swademarmelade

7-2-2007 6:40 PM

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scienc, animals

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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/2b10a951-ab4f-487a-997b-35053c8c5c50/4486C668-4728-4022-B288-D6DB659CD582/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://www.livescience.com/health/070702_mole_rats.html" href="http://www.livescience.com/health/070702_mole_rats.html" style="font-size: 11px;">www.livescience.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.livescience.com/health/070702_mole_rats.html"><P>
In African naked mole-rat colonies, the queen is the only reproducing female—a feat she accomplishes by bullying around her fellow blind, tunnel-digging companions.
</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.livescience.com/health/070702_mole_rats.html"><P>
“The <A href="http://www.livescience.com/php/multimedia/imagedisplay/img_display.php?pic=061009_mole_rat_02.jpg&cap=A+pregnant+naked+mole-rat+that+is+15+years+old.+Credit:+Rochelle+Buffenstein%2FCity+College+of+New+York.&title=Animal+Study:+Stress+Might+Induce+Infertility">queen</A>  exerts her dominance over the colony by, literally, pushing the other members of the colony around. She shoves them to show who’s boss,” said Chris Faulkes, a zoologist at the University of London.
</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.livescience.com/health/070702_mole_rats.html"><P>
Faulkes explained that the stressful domination reduces fertility hormone levels—effectively suppressing puberty in young mole-rats, lowering sperm counts in males and even turning off the <A href="http://www.livescience.com/health/ap_060522_menstrual_end.html">female ovulatory cycle</A> .
</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.livescience.com/health/070702_mole_rats.html"><P>
Faulkes thinks stress and fertility areas of the brain are closely related in most mammals, so careful comparisons of mole-rats to humans could reveal how genes, environment, up-bringing and culture contribute to human infertility.
</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.livescience.com/health/070702_mole_rats.html"><DIV class="slide firstslide">
						<A href="javascript:alert('This link contains javascript. Please visit the clip source to follow this link.');" target="_self"><IMG width="86" height="12" alt="" src="http://www.livescience.com/template_images/buttons/btn_enlargephoto.gif" /></A>
						<DIV class="photo">
							<A href="javascript:alert('This link contains javascript. Please visit the clip source to follow this link.');" target="_self"><IMG width="163" height="110" alt="" src="http://images.livescience.com/images/061009_mole_rat_01.jpg" id="enlargeImageModule_image" /></A>
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						<DIV id="enlargeImageModule_text" class="text"><A class="relatedphoto" href="javascript:alert('This link contains javascript. Please visit the clip source to follow this link.');" target="_self">A pregnant naked mole-rat that is 15 years old. Credit: Rochelle Buffenstein/City College of New York.</A></DIV>
					</DIV></blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/4486C668-4728-4022-B288-D6DB659CD582/blog/" title="blog or email this clip"><img src="http://content7.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>

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