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:9/18/2014)... University and the Quebec government have discovered microplastics ... Journal of Fisheries and Aquatic Sciences . , ... or industrial cleansers, to which they are commonly ... and buoyancy, they may readily pass through sewage ... in the world,s oceans, but have only recently ...
(Date:9/18/2014)... of Americans to undertake jaunts into the countryside each year ... within a century, according to new research. , Climate change ... United States as summer temperatures linger later into the year, ... and Biogeography . For instance, the paper birch a ... Hampshire could change color one to three weeks later ...
(Date:9/18/2014)... colleagues have built the first smartphone app that ... behavioral trends. In other words, your smartphone knows ... don,t -- and how that affects you. , ... depression and loneliness to their academic performance, also ... for example, to monitor mental health, trigger intervention ...
Breaking Biology News(10 mins):Microplastic pollution discovered in St. Lawrence River sediments 2Fall foliage season may be later, but longer on warmer Earth 2Fall foliage season may be later, but longer on warmer Earth 3Fall foliage season may be later, but longer on warmer Earth 4New Dartmouth smartphone app reveals users' mental health, performance, behavior 2New Dartmouth smartphone app reveals users' mental health, performance, behavior 3New Dartmouth smartphone app reveals users' mental health, performance, behavior 4
... do rose petals have rounded ends while their leaves are more pointed? ... PLOS Biology , John Innes Centre and University of East Anglia ... a hidden map located within growing buds. The map features ... a leaf, the pattern of arrows converges towards the tip of the ...
... public entities conducting research in synthetic biology worldwide grew ... version of an interactive map produced by the Synthetic ... Scholars. The map is available online at http://www.synbioproject.org/map ... on the design and construction of new biological parts ...
... April 30, 2013 Signal Hill, CA Bowman Design ... in identity, exhibits, and event marketing, is the first ... "Sustainable Company" certification from FAMAB, the German exhibition and ... Group,s audit established that the company met or exceeded ...
Cached Biology News:Synthetic biology research community grows significantly 2Bowman Design Group is first US company awarded German FAMAB 'Sustainable Company' certification 2
(Date:9/19/2014)... rather than electricity, to move data would consume ... a growing concern as chips, transistor counts rise. ... circuits light emitters, modulators, and detectors ... light source for optical chips is molybdenum disulfide ... as a single, atom-thick layer. Other experimental on-chip ...
(Date:9/19/2014)... 2014 Biotech companies make announcements ... drug systems and advanced Laboratory Instrumentation. Companies in focus ... BDX ), Thermo Fisher Scientific Inc. (NYSE: ... RGDO ), Sangamo Biosciences Inc. (NASDAQ: ... Pressure BioSciences, Inc. (OTCQB: PBIO) ("PBI" or the "Company") ...
(Date:9/19/2014)... SPRINGS, Florida , September 19, 2014 ... companies release latest developments, patents and results of studies ... GNSZ), Eli Lilly and Company (NYSE: LLY ... Celgene Corporation (NASDAQ: CELG ) and Arena ... GNSZ), a leader in developing prodrug therapeutics for the ...
(Date:9/19/2014)... DUBLIN , September 19, 2014 ... Research and Markets ( http://www.researchandmarkets.com/research/b2jxhs/micro_market ) has announced the ... Pre-packed Chromatography Columns"  report to their offering.  ... columns market is one of the fastest-growing segments ... at $1.2 billion in 2013, and expected to ...
Breaking Biology Technology:Toward optical chips 2Toward optical chips 3Medical Instrumentation Automation Advances for Biological Sample Preparation - Company Expects Q4 Revenue Impact from Newest Instrument Systems 2Medical Instrumentation Automation Advances for Biological Sample Preparation - Company Expects Q4 Revenue Impact from Newest Instrument Systems 3Medical Instrumentation Automation Advances for Biological Sample Preparation - Company Expects Q4 Revenue Impact from Newest Instrument Systems 4Medical Instrumentation Automation Advances for Biological Sample Preparation - Company Expects Q4 Revenue Impact from Newest Instrument Systems 5Medical Instrumentation Automation Advances for Biological Sample Preparation - Company Expects Q4 Revenue Impact from Newest Instrument Systems 6Medical Instrumentation Automation Advances for Biological Sample Preparation - Company Expects Q4 Revenue Impact from Newest Instrument Systems 7Biotech Companies Pushing Sector Higher With Recent Therapeutic Advancements & Patent Approvals - Company Wins Summary Judgment For Prodrug Patent 2Biotech Companies Pushing Sector Higher With Recent Therapeutic Advancements & Patent Approvals - Company Wins Summary Judgment For Prodrug Patent 3Biotech Companies Pushing Sector Higher With Recent Therapeutic Advancements & Patent Approvals - Company Wins Summary Judgment For Prodrug Patent 4Biotech Companies Pushing Sector Higher With Recent Therapeutic Advancements & Patent Approvals - Company Wins Summary Judgment For Prodrug Patent 5Biotech Companies Pushing Sector Higher With Recent Therapeutic Advancements & Patent Approvals - Company Wins Summary Judgment For Prodrug Patent 6Biotech Companies Pushing Sector Higher With Recent Therapeutic Advancements & Patent Approvals - Company Wins Summary Judgment For Prodrug Patent 7Micro Market Monitor : Global Pre-packed Chromatography Columns 2
... , , ... , , , ... analysis.,By comparing the separated bands,of an unknown sample to a ... fragment,can be estimated. The Agilent,2100 bioanalyzer is an instrument,which utilizes ...
... , , ... , , , Whereas in ... molecules, the development of soft ionization methods,such as matrix-assisted laser desorption/ionization ... the analysis of proteins up to 300 kDa using MS has,become ...
... , , , ... , , , , ... studying functional,assays requiring the transfection of small interfering RNA (siRNA),into a cell, ... given cell lines would be of great value.,Three to four siRNA sequences ...
Cached Biology Technology:High resolution DNA analysis with the,DNA 500 and DNA 1000 LabChip kits 2High resolution DNA analysis with the,DNA 500 and DNA 1000 LabChip kits 3High resolution DNA analysis with the,DNA 500 and DNA 1000 LabChip kits 4High resolution DNA analysis with the,DNA 500 and DNA 1000 LabChip kits 5Using the Agilent 2100 bioanalyzer for,quality control of protein samples prior to,MS-analysis 2Using the Agilent 2100 bioanalyzer for,quality control of protein samples prior to,MS-analysis 3Using the Agilent 2100 bioanalyzer for,quality control of protein samples prior to,MS-analysis 4Using the Agilent 2100 bioanalyzer for,quality control of protein samples prior to,MS-analysis 5siRNA transfection optimization,with the Agilent 2100 bioanalyzer 2siRNA transfection optimization,with the Agilent 2100 bioanalyzer 3siRNA transfection optimization,with the Agilent 2100 bioanalyzer 4siRNA transfection optimization,with the Agilent 2100 bioanalyzer 5siRNA transfection optimization,with the Agilent 2100 bioanalyzer 6siRNA transfection optimization,with the Agilent 2100 bioanalyzer 7
...
Human Presenilin-2 NTF Affinity Purified Polyclonal Ab...
2'-Fluorine-CTP (2'-F-CTP) is readily incorporated into transcripts by T7 and SP6 R&DNA™ Polymerase and is available separately....
Human Glypican 2 Biotinylated Affinity Purified PAb...
Biology Products: