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



SOURCE: Cell Press, news release, Dec. 13, 2007


'/>"/>
Copyright©2007 ScoutNews,LLC.
All rights reserved

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:3/23/2017)... ... March 23, 2017 , ... The physicians of KSF ... the greater Houston Area. The new location is located at 2255 E. Mossy Oaks ... Springwoods Village. This newest location will provide patients living in the north Houston area ...
(Date:3/23/2017)... ... March 23, 2017 , ... Texas Physical Therapy Specialists (TexPTS) ... Road in Building 2. The clinic is the group’s second in New Braunfels and ... the company’s second New Braunfels location brings things full circle for the group, “It’s ...
(Date:3/23/2017)... ... , ... The IoT (Internet of Things) is revolutionizing the way the world ... businesses and individual consumers alike. Laboratories can maximize their profit margin by increasing ... $4 trillion to $11 trillion dollars by the year 2025. McKinsey expects the IoT ...
(Date:3/23/2017)... , ... March 23, 2017 , ... 82% of adults are unaware of the dangers ... not brush their teeth the minimum two times a day that dentists recommend. The ramifications ... 51 million hours of school and adults missing 164 million hours of work each year ...
(Date:3/23/2017)... ... ... March is National Kidney Month – the perfect time to pause and thank ... Every day, two kidneys filter about 120 to 150 quarts of blood. Put another ... regulating fluid levels and blood pressure, supporting bone health and promoting red blood cell ...
Breaking Medicine News(10 mins):
(Date:3/24/2017)... 2017 FinancialBuzz.com News Commentary  ... According to new ... market research, the legal cannabis market is projected to continue ... conflicting signals from the current presidential administration. The report created ... biggest drivers of growth in this industry are the passage ...
(Date:3/24/2017)... 24, 2017 Research and Markets has announced the ... report to their offering. ... The IPF pipeline is very strong with a total of 97 ... Inc., Biogen and Sanofi are involved in the development of the IPF ... is in Phase III stage, 15 are in Phase II stage, 12 ...
(Date:3/24/2017)... , March 24, 2017 A ReportsnReports.com ... has been growing rapidly as the global sales of Adcetris and ... growth in the antibody drug conjugates market is driven by large ... cancer and wider therapeutic window offered by ADCs. ... Browse 3 Tables and 94 Figures, ...
Breaking Medicine Technology: