Navigation Links
Menopause May Be Unique to Humans
Date:12/13/2007

Chimps, other primates don't seem to have a marked cut-off for fertility, researchers say

THURSDAY, Dec. 13 (HealthDay News) -- Scientists have found no evidence that female chimpanzees go through menopause in the way that human females do -- even though their ability to reproduce tends to taper off at a similar age.

"When we look at the healthiest individuals, it looks like chimpanzees may actually be reproducing better than humans in their forties," researcher Melissa Emery Thompson, of Harvard University, said in a prepared statement. "The oldest chimpanzee known to give birth in the wild is estimated to have been 55. She began reproductive cycling again shortly before her death at the age of 63."

Thompson's team analyzed fertility rate data on female chimpanzees in the wild. They found that they, like humans, have declining birth rates after the age of 40. This suggests that the "biological clock" in humans has been relatively preserved over the course of evolution, the study authors said.

However, unlike humans, female chimpanzee fertility tends to decline along with their survival odds. Healthy females maintain high birth rates late into life.

"The adaptive significance of human menopause, or post-reproductive life span, is still debated. This study provides greater evolutionary context to this debate," Thompson and her colleagues wrote.

These findings in chimpanzees, along with recent findings in wild gorillas and orangutans, indicate that "menopause is not part of the life cycle of living apes but has been uniquely derived in the human lineage."

The study is published in the Dec. 13 issue of the journal Current Biology.

More information

The U.S. National Institute on Aging has more about menopause.



-- Robert Preidt
'/>"/>

Copyright©2007 ScoutNews,LLC.
All rights reserved

Page: 1 2

Related medicine news :

1. Removing Ovaries Before Menopause Leads to Memory, Movement Troubles
2. Bradley Pharmaceuticals to Feature Elestrin(TM) at North American Menopause Society Annual Meeting
3. Duramed Launches New Indication for ENJUVIA(TM) (Synthetic Conjugated Estrogens, B) at North American Menopause Society Annual Meeting
4. Obesity risks increase after menopause
5. Unique role for blood formation gene identified
6. New Seminar Series from Activator Methods Teaches Doctors a Unique Approach to Improving Nations Chiropractic Care: Focus on the Patients
7. Blue Cross and Blue Shield Association Nationally Recognized by BusinessWeek and AARP for Creating a Unique Workplace Environment for New and Mature Employees
8. Frutarom Acquires Gewurzmuller, a Company Specializing in Unique Savory Flavors
9. Video: Trinity Mother Frances Neurosurgeon First in Region to Remove Brain Tumor Using Unique Surgical Procedure
10. Graduates of Unique New Labor/Management Healthcare Workforce Training Program Honored Today in Oakland
11. Deep Breeze Ltd. Launches Unique Non-Invasive, Radiation-Free Pulmonary Imaging System in the U.S.
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/23/2014)... NY, April 23, 2014Men whose testosterone falls below normal ... to be overweight and have heart disease and type ... identify testosterone-deficient men for further testing and possible treatment ... Men,s Health , a peer-reviewed publication from Mary Ann ... the Journal of Men,s Health website at ...
(Date:4/23/2014)... (April 23, 2014) The American Gastroenterological Association ... 2014 AGA Research Scholars. The AGA Research Scholar ... to develop independent and productive research careers in ... Awards fund an additional year allowing for three ... to supporting junior faculty who are paving the ...
(Date:4/23/2014)... country as wealthy as the United States, it may come ... have access to adequate food due to lack of money ... Recent research at the University of Illinois using data from ... the seniors who are dealing with hunger are also facing ... percent of Americans over age 60 faced the threat of ...
(Date:4/23/2014)... about an increase in adolescents, marijuana use following the ... relief. According to a new study at Rhode Island ... states with and without medical marijuana laws, legalizing the ... The study is published online in advance of print ... , "Any time a state considers legalizing medical marijuana, ...
(Date:4/23/2014)... may prevent the depletion of self-control, according to research ... the Association for Psychological Science. , Self-control can be ... focus attention on a boring textbook are hard things ... this difficulty: Exerting self-control for a long period seems ... subsequent tasks. , "It is as if self-control is ...
Breaking Medicine News(10 mins):Health News:AGA announces 2014 Class of AGA Research Scholars 2Health News:More Americans in their golden years are going hungry 2Health News:RI Hospital physician: Legalizing medical marijuana doesn't increase use among adolescents 2Health News:ADHD drug may help preserve our self-control resources 2
... The world's leading climate experts and state representatives from ... meet on the UN's recommendations for curbing// carbon emissions ... now," said Chartree Chueytrasit, deputy permanent secretary of Thailand's ... at the UN's Intergovernmental Panel on Climate Change (IPCC). ...
... focus on cars or factories. Yet a study commissioned ... production plants must run worldwide just to provide electricity ... PCs in private or corporate settings to be figured ... disposal of the machines, all of which damage the ...
... chemotherapy drug has recently been tested in 950 ... found //to have significant improvement in Progression-Free Survival. ... Phase III trial on Satraplatin has shown: ... in Progression-Free Survival ,* Progression-Free ...
... get married is a waste of breath, a US expert ... // ,William Smith, the vice president of the Sexuality, ... a six-year study commissioned by the US Congress found that ... on pushing sexual abstinence outside marriage had had no discernible ...
... for health, Indiana legislators in the US have decided on ... healthcare. // ,As per a deal agreed upon on ... cents per pack and the expected additional flow to the ... would help fund several health programs. ,Most of ...
... of successive Australian governments, a report commissioned by the ... lags an appalling one century behind that of the ... have significantly worse outcomes than their fellow countrymen on ... while inequality exists between Maori and non-Maori the gaps ...
Cached Medicine News:Health News:Study Focus on Environmental Hazards Posed by IT Scraps 2Health News:Satraplatin Benefits Hormone Refractory Prostate Cancer Patients 2Health News:Satraplatin Benefits Hormone Refractory Prostate Cancer Patients 3Health News:Satraplatin Benefits Hormone Refractory Prostate Cancer Patients 4Health News:Satraplatin Benefits Hormone Refractory Prostate Cancer Patients 5Health News:Smokers to Be Taxed to Fund Healthcare for Uninsured 2Health News:Aborigines Century Behind the Health of Colonizers, WHO Report 2
(Date:1/15/2014)... AARP Foundation today announced it has established a ... severe cold weather that has gripped much of the nation. ... need; so to support these emergency relief efforts AARP and ... could mean up to $500,000 in aid. The matching program ...
(Date:1/15/2014)... , January 15, 2014 Shire plc (LSE: SHP, ... Office of Fair Trading (OFT) approval condition to the announced tender ... VPHM).   As a result of the waiver, the ... to complete the tender offer on January 24, 2014 following the ...
(Date:1/15/2014)... 2014  In an unprecedented effort to curb the spread of "superbugs" ... transport vehicles, an advanced and portable UV germicidal lamp manufactured by ... time. In order to prevent EMS paramedics and ... West Palm Beach Fire Rescue is the first ...
Breaking Medicine Technology:AARP Foundation Establishes Winter Relief Fund for Older Adults Suffering from the Severe Cold Weather 2AARP Foundation Establishes Winter Relief Fund for Older Adults Suffering from the Severe Cold Weather 3Shire Waives OFT Condition Relating to the Acquisition of ViroPharma Inc. 2Shire Waives OFT Condition Relating to the Acquisition of ViroPharma Inc. 3Superbugs No Longer Ride In Rescue Vehicles 2
... 2011 Generex Biotechnology Corporation (OTCBB: GNBT) ( ... subsidiary Antigen Express, Inc. ( www.antigenexpress.com ) presented ... with an off-the-shelf immunotherapeutic cancer vaccine, AE37, in ... Sixth Annual ImVacS: The Immunotherapeutics and Vaccine Summit ...
... Inc. (Nasdaq: REGN ) today announced that clinical ... will be presented at the upcoming American Society of Retina ... 22, 2011 in Boston, Massachusetts. The presentations ... Phase 3 VIEW 1 and VIEW 2 Studies Comparing VEGF ...
Cached Medicine Technology:Generex Subsidiary Antigen Express Provides Update on Phase 2 Breast Cancer Immunotherapy Program 2Generex Subsidiary Antigen Express Provides Update on Phase 2 Breast Cancer Immunotherapy Program 3Generex Subsidiary Antigen Express Provides Update on Phase 2 Breast Cancer Immunotherapy Program 4Regeneron Announces Clinical Presentations at ASRS 2011 Annual Meeting 2Regeneron Announces Clinical Presentations at ASRS 2011 Annual Meeting 3
... products for autoimmune testing feature single-well ANA ... as specific reflex tests including dsDNA, and ... (Ro), SS-B (La), Scl-70 and Jo-1. In ... full line of products for Cardiolipins (IgA, ...
... ELISA products for autoimmune testing feature single-well ... well as specific reflex tests including dsDNA, ... SS-A (Ro), SS-B (La), Scl-70 and Jo-1. ... a full line of products for Cardiolipins ...
... ELISA products for autoimmune testing feature single-well ... well as specific reflex tests including dsDNA, ... SS-A (Ro), SS-B (La), Scl-70 and Jo-1. ... a full line of products for Cardiolipins ...
... ARUP Laboratories is a national reference laboratory ... research and development. ARUP offers an extensive ... medical tests in clinical and anatomic pathology. ... Laboratories' clients include more than half of ...
Medicine Products: