Navigation Links
Menopause evolved to prevent competition between in-laws
Date:8/21/2012

The menopause evolved, in part, to prevent competition between a mother and her new daughter-in-law, according to research published today (23 August 2012) in the journal Ecology Letters.

The study by researchers from the University of Turku (Finland), University of Exeter (UK), University of Sheffield (UK) and Stanford University (US) explains for the first time why the relationship women had with their daughter-in-laws could have played a key role.

The data showed that a grandmother having a baby later in life, and at the same time as her daughter-in-law, resulted in the newborns of each being 50 per cent less likely to survive to adulthood.

The analysis helps to solve one of nature's great mysteries: why female humans, unlike most other animals, stop reproducing so early in life.

It also adds weight to the theory that the menopause evolved to allow women to focus on their grandchildren. Traditionally, this role included providing food for the family and protecting young children from accidents and disease.

The topic has rarely been analysed, because it requires detailed data on the reproductive success of several generations of women, with knowledge on who lived with whom and when. Scientists analysed 200-years' worth of data collected by Dr Virpi Lummaa of the University of Sheffield and her student Mirkka Lahdenper of Turku University, Finland, from church registers of pre-industrial Finland. They looked at information on birth and death rates from 1700 to 1900, before the advent of modern contraception or healthcare.

The study reveals that women had more grandchildren if they stopped reproducing around the age of 50. The research team believes this was partly because of reduced competition between the older woman and her daughter-in-law and partly because of the support she could offer her grandchildren.

A child born to families with a mother-in-law and daughter-in-law reproduci
'/>"/>

Contact: Sarah Hoyle
s.hoyle@exeter.ac.uk
44-013-927-22062
University of Exeter
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Pycnogenol (French maritime pine bark extract) shown to improve menopause symptoms in new study
2. Ion selectivity in neuronal signaling channels evolved twice in animals
3. Out of the mouths of primates, facial mechanics of human speech may have evolved
4. Excessive worrying may have co-evolved with intelligence
5. Leading evolutionary scientist to discuss how genome of bacteria has evolved
6. Stem cells may prevent post-injury arthritis
7. Method to prevent rejection of disease-fighting proteins described in Human Gene Therapy journal
8. Flightless molecule may prevent cancer from spreading from 1 tissue to another
9. FirstMark Scientific Board of Advisors Meet to Discuss New Clinical Studies for PREvent
10. LSUHSC research finds treating stress prevented new MS brain lesions
11. Can you hear me now? New strategy discovered to prevent hearing loss
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/23/2015)... July 23, 2015 Aware, Inc. (NASDAQ: AWRE ... reported financial results for its second quarter ended June 30, ... 2015 was $4.5 million, a decrease of 33% compared to ... in the second quarter of 2015 was $0.3 million, or ... $0.04 per diluted share, in the same period a year ...
(Date:7/20/2015)...  Acuity Market Intelligence,s latest research "The Global ... and Privacy" forecasts that between 2014 and 2020 ... downloaded to smart mobile devices by 2.2 billion ... projected to generate more than $67.9 billion in ... period.    "Biometrics is at the ...
(Date:7/9/2015)... Calif. , July 9, 2015  Unchained ... today announcing its acquisition of Avid Nano. Avid ... light scattering (DLS) systems.    Also ... smallest, fastest and easiest to use protein sizing ... that measures a protein,s hydrodynamic size, size distribution, ...
Breaking Biology News(10 mins):Aware, Inc. Reports Second Quarter 2015 Financial Results 2Aware, Inc. Reports Second Quarter 2015 Financial Results 3Aware, Inc. Reports Second Quarter 2015 Financial Results 4Aware, Inc. Reports Second Quarter 2015 Financial Results 5Aware, Inc. Reports Second Quarter 2015 Financial Results 6Biometrics on Smart Mobile Devices to Redefine Digital Identity with 12.9 Billion Biometric App Downloads between 2014 and 2020 2Unchained Labs just can't get enough, acquires Avid Nano, rocks out the new pUNk! 2
... has released the final "Integrated Science Assessment for Oxides ... of the scientific literature on the potential adverse human ... particularly nitrogen dioxide or NO2. There are significant ... scientific review document released in 1993. Oxides ...
... in Spanish . Cancer is a ... adaptative changes give higher proliferative capacity to cancer cells, ... agents. The research group led by Dr. Jos Carlos ... the CSIC (IIBB-CSIC), a centre linked to the Institut ...
... IMMEDIATE RELEASE Detecting flu viruses in remote areas of ... Researchers in Ohio and New Mexico are reporting an advance ... viruses one that requires no refrigeration and can be used ... emerge. Their new method, the first to use sugar molecules rather ...
Cached Biology News:Mitochondrial cholesterol makes response to chemotherapy difficult in hepatic cancer 2American Chemical Society's Weekly PressPac -- July 9, 2008 2American Chemical Society's Weekly PressPac -- July 9, 2008 3American Chemical Society's Weekly PressPac -- July 9, 2008 4American Chemical Society's Weekly PressPac -- July 9, 2008 5American Chemical Society's Weekly PressPac -- July 9, 2008 6American Chemical Society's Weekly PressPac -- July 9, 2008 7American Chemical Society's Weekly PressPac -- July 9, 2008 8American Chemical Society's Weekly PressPac -- July 9, 2008 9
(Date:7/30/2015)... July 30, 2015 HIGHLIGHTS:Q2 2015 ... 2014) , Reported sales were $697 million compared ... Sales grew organically by 8%, and changes in foreign ... increased sales by 1%. , By business unit, ... Applied and 11% in SAFC Commercial. , Reported ...
(Date:7/29/2015)... 30, 2015 Sanofi, un ... ses résultats pour le premier semestre 2015. Le ... résultats. Visionner l,interview vidéo et lire ... Au sommaire de l,interview :  ... de croissance - Diabète ...
(Date:7/29/2015)... 29, 2015  HealthSouth Corporation (NYSE: ... of post-acute healthcare services, offering both facility-based and ... operations for the second quarter ended June 30, 2015. ... by strong volume growth in both segments and ... Jay Grinney, President and Chief Executive Officer of ...
(Date:7/29/2015)... 2015  AmnioChor Inc., an early stage biotech startup ... to announce that the Musculoskeletal Transplant Foundation of ... in their seed round of development of the proprietary ... AmnioChor,s technology allows cryopreservation of the ... cells living within those tissues. Amnion is a well-established ...
Breaking Biology Technology:Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 2Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 3Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 4Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 5Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 6Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 7Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 8Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 9Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 10Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 11Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 12Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 13Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 14Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 15Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 16Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 17Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 18Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 19Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 20HealthSouth Reports Results for Second Quarter 2015 2HealthSouth Reports Results for Second Quarter 2015 3HealthSouth Reports Results for Second Quarter 2015 4HealthSouth Reports Results for Second Quarter 2015 5HealthSouth Reports Results for Second Quarter 2015 6HealthSouth Reports Results for Second Quarter 2015 7HealthSouth Reports Results for Second Quarter 2015 8HealthSouth Reports Results for Second Quarter 2015 9HealthSouth Reports Results for Second Quarter 2015 10HealthSouth Reports Results for Second Quarter 2015 11HealthSouth Reports Results for Second Quarter 2015 12HealthSouth Reports Results for Second Quarter 2015 13HealthSouth Reports Results for Second Quarter 2015 14HealthSouth Reports Results for Second Quarter 2015 15HealthSouth Reports Results for Second Quarter 2015 16HealthSouth Reports Results for Second Quarter 2015 17
... MOUNTAIN VIEW, Calif., Dec. 4 Based on ... & Sullivan recognizes Honeywell Enraf with the 2008 ... Honeywell Enraf,s comprehensive suite of blending products facilitates ... and other materials, but also minimizes the end-products, ...
... of Life Technologies Corporation (NASDAQ:LIFE), a provider of ... announced that its technology for next-generation genomic analysis, ... Science Innovation of the Year for 2008 by ... the life science industry. In making the announcement ...
... an estimated ten percent of pregnant women in the U.S. ... cigarette byproducts from mothers who smoke affects an estimated 420,000 ... , Now, in the first study of its kind, a ... umbilical cord blood to better understand the fetal health risks ...
Cached Biology Technology:Frost & Sullivan Commends Honeywell Enraf for Cutting-Edge Products and Post-Sales Support 2Frost & Sullivan Commends Honeywell Enraf for Cutting-Edge Products and Post-Sales Support 3 Applied Biosystems SOLiD System Named Life Science Innovation of the Year : The Scientist Magazine Cites the Technology's High Throughput, Lower Sequencing Cost, and Rapid Technology Innovation for Unlocking New Approaches to Clinical Research 2 Applied Biosystems SOLiD System Named Life Science Innovation of the Year : The Scientist Magazine Cites the Technology's High Throughput, Lower Sequencing Cost, and Rapid Technology Innovation for Unlocking New Approaches to Clinical Research 3 Applied Biosystems SOLiD System Named Life Science Innovation of the Year : The Scientist Magazine Cites the Technology's High Throughput, Lower Sequencing Cost, and Rapid Technology Innovation for Unlocking New Approaches to Clinical Research 4 Applied Biosystems SOLiD System Named Life Science Innovation of the Year : The Scientist Magazine Cites the Technology's High Throughput, Lower Sequencing Cost, and Rapid Technology Innovation for Unlocking New Approaches to Clinical Research 5Cutting the cord to determine babies' health risk from toxic exposure 2Cutting the cord to determine babies' health risk from toxic exposure 3Cutting the cord to determine babies' health risk from toxic exposure 4
Ready-to-use solution....
...
... Conjugated peptides or recombinant proteins ... to produce antibodies in 2 rabbits. pre-immune ... ELISA test until the titer reaches 1:4,000 ... Protein G purification Antibodies are eluted ...
Immunogen: Synthetic peptide (aa sequence is considered to be commercially sensitive) Storage: -20 C, Avoid Freeze/Thaw Cycles...
Biology Products: