Navigation Links
New evidence for female control in reproduction
Date:11/19/2007

WASHINGTON, D.C. Adding another layer of competition to the mating game, scientists are reporting possible biochemical proof that the reproductive system of female mammals can sense the presence of sperm and react to it by changing the uterine environment. This may be the molecular mechanism behind post-copulatory sexual selection, in which females that have mated with several partners play a role in determining which sperm fertilizes their egg.

Lead author Alireza Fazeli says that the deep new molecular insights into this post-coital ladies choice has profound implications for in-vitro fertilization (IVF), cloning, and animal breeding. It is also a windfall for evolutionary biology, providing a possible explanation for female promiscuity in the animal kingdom, he adds.

In a first-of-its-kind study scheduled for ACS Journal of Proteome Research, Fazelis international scientific team reports the first chemical evidence of a sperm recognition system in the oviducts of pigs standard animals for such research because their reproductive systems are similar to humans.

In the traditional view, competition for the egg is male-oriented, with sperm themselves deciding which fertilizes the egg by being the faster swimmer. With post-copulatory sexual selection, the female is in control, her oviducts selecting the winner the best quality sperm from the healthiest male and rejecting the rest.

This study clearly shows that the sperms arrival in the female reproductive tract triggers a cascade of changes that leads to alteration of protein production in the oviduct and a change in the oviductal environment. We speculate that this is mainly done to prepare oviduct environment for storing sperm, fertilization and early embryonic development, Fazeli said. However this can also be used as a detection and selection system that alerts females to the presence of different kinds of sperm and then triggers mechanisms in the oviducts that control
'/>"/>

Contact: Michael Bernstein
m_bernstein@acs.org
202-872-4400
American Chemical Society
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. A private bandwidth for communication in bats: Evidence from insular horseshoe bats
2. Comet probes reveal evidence of origin of life, scientists claim
3. Evidence of a relationship between swimming babies and infections
4. Researchers find evidence linking stress caused by the Sept. 11 disaster with low birth weights
5. Fossil record supports evidence of impending mass extinction
6. Sex is thirst-quenching for female beetles
7. UT Southwestern researchers identify hundreds of genes controlling female fertility
8. Why do males and females frequently differ in body size and structure?
9. X-effect: female chromosome confirmed a prime driver of speciation
10. Vaginal reconstruction not needed for most inter-sex females, Hopkins study shows
11. Gene in male fish lures females into sex
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/20/2015)... -- Acuity Market Intelligence,s latest research "The Global Biometrics ... Privacy" forecasts that between 2014 and 2020 nearly ... to smart mobile devices by 2.2 billion mobile ... to generate more than $67.9 billion in total ...    "Biometrics is at the center ...
(Date:7/9/2015)... 2015 Research and ... the "Biometrics for Banking; Market & Technology ... to their offering. The adoption for ... growth and the forecast is that by 2020 ... companies involved in delivering biometric systems to the ...
(Date:7/8/2015)... FRANKLIN LAKES , N.J. and NEW YORK ... and Company) and Guidepoint today announced ... selected start-up healthcare companies with free access to Guidepoint,s ... mentoring several start-ups that are developing cutting-edge technologies to ... of a dedicated Guidepoint research manager, each start-up entrepreneur ...
Breaking Biology News(10 mins):Biometrics on Smart Mobile Devices to Redefine Digital Identity with 12.9 Billion Biometric App Downloads between 2014 and 2020 2Global Banking Biometrics Market 2015-2020 - Market & Technology Analysis, Adoption Strategies and Forecasts 2Global Banking Biometrics Market 2015-2020 - Market & Technology Analysis, Adoption Strategies and Forecasts 3BD and Guidepoint Team to Connect Healthcare Start-up Companies With Business and Scientific Experts 2BD and Guidepoint Team to Connect Healthcare Start-up Companies With Business and Scientific Experts 3
... of Copenhagen have agreed to set up a ... resources can benefit the country. Greenland,s premier, Kuupik ... support the initiative. The committee will examine ... how they can create value for Greenland through, ...
... A South Dakota School of Mines & Technology ... species of herbivorous dinosaur and published the first fossil ... Research by Clint Boyd, Ph.D., provides the first definitive ... of choice for the crocodyliform, a now extinct relative ...
... of hundreds of thousands of individuals (known as Genome-wide ... regions in the genome to the risk of developing ... (EMBL) and the University of Heidelberg, through the joint ... one step further by pinpointing the exact genes that ...
Cached Biology News:Experts to calculate potential of Greenlandic mineral wealth 2Research unearths new dinosaur species 2Research unearths new dinosaur species 3Zeroing in on heart disease 2
(Date:7/30/2015)... ATLANTA , July 30, 2015 ... leaders to the 2015 AACC Annual Meeting & ... from July 26–30. The meeting showcased revolutionary ... improves the ability of healthcare providers to diagnose ... get effective medical treatment. As ...
(Date:7/30/2015)... ... 2015 , ... The 2015 Market Research Report on the Global Propanol ... global Propanol market with a focus on the Chinese situation. Major companies included in ... ISU Chemical, Sanofi, Royal Dutch Shell, LG Chem and Zhejiang Xinhua Chemical. , The ...
(Date:7/30/2015)... KANSAS CITY, Kan. , July 30, 2015 ... PETX ), a pet therapeutics company focused on ... products for companion animals, today announced that its ... results from a dose confirmation study of AT-016, ... to Aratana for the treatment of osteoarthritis pain ...
(Date:7/30/2015)... 30, 2015 Ascendis Pharma A/S (Nasdaq: ... its innovative TransCon technology to address significant unmet ... a six-month Phase 2 study to evaluate the ... in 53 treatment-naïve, pre-pubertal children with growth hormone ... pleased with the top-line results from our Phase ...
Breaking Biology Technology:Innovative Research on Cancer, Heart Disease, and Infectious Diseases Draws More than 17,500 Attendees to 2015 AACC Annual Meeting 2Innovative Research on Cancer, Heart Disease, and Infectious Diseases Draws More than 17,500 Attendees to 2015 AACC Annual Meeting 3Innovative Research on Cancer, Heart Disease, and Infectious Diseases Draws More than 17,500 Attendees to 2015 AACC Annual Meeting 4Global Propanol Market Technical Data and Manufacturing Analysis 2020 2Global Propanol Market Technical Data and Manufacturing Analysis 2020 3Aratana Therapeutics Announces Positive Pilot Field Study for AT-016 2Aratana Therapeutics Announces Positive Pilot Field Study for AT-016 3Aratana Therapeutics Announces Positive Pilot Field Study for AT-016 4Aratana Therapeutics Announces Positive Pilot Field Study for AT-016 5Ascendis Pharma A/S Announces Positive Top-line Results from a Phase 2 Pediatric Study of Once-Weekly TransCon Growth Hormone for the Treatment of Growth Hormone Deficiency 2Ascendis Pharma A/S Announces Positive Top-line Results from a Phase 2 Pediatric Study of Once-Weekly TransCon Growth Hormone for the Treatment of Growth Hormone Deficiency 3Ascendis Pharma A/S Announces Positive Top-line Results from a Phase 2 Pediatric Study of Once-Weekly TransCon Growth Hormone for the Treatment of Growth Hormone Deficiency 4Ascendis Pharma A/S Announces Positive Top-line Results from a Phase 2 Pediatric Study of Once-Weekly TransCon Growth Hormone for the Treatment of Growth Hormone Deficiency 5Ascendis Pharma A/S Announces Positive Top-line Results from a Phase 2 Pediatric Study of Once-Weekly TransCon Growth Hormone for the Treatment of Growth Hormone Deficiency 6Ascendis Pharma A/S Announces Positive Top-line Results from a Phase 2 Pediatric Study of Once-Weekly TransCon Growth Hormone for the Treatment of Growth Hormone Deficiency 7
... Larry Bossidy have been lionized in the press and ... bottom line performance and stellar financial results. While these ... lessons, the management philosophies they represent and the practices ... Jacks rank and yank approach to pruning the bottom ...
... impressions. And I have to admit that when my former ... issue of DEMOletter, I was rather dismissive. After all, the ... were imploding left and right and I was certain that ... long. , ,I couldn't have been more wrong. More than two ...
... Aurora Health Care , based in Milwaukee, will become ... eICU technology to its critical-care patients. The eICU solution ... to connect and provide off-site critical care physicians and ... patients. , ,Baltimore-based Visicu Inc. developed ...
Cached Biology Technology:Seven leadership lessons of Next Generation Companies 2Seven leadership lessons of Next Generation Companies 3Confoti: Revisiting a dotcom business model 2Confoti: Revisiting a dotcom business model 3Confoti: Revisiting a dotcom business model 4Confoti: Revisiting a dotcom business model 5
Mouse monoclonal [7B9] to beta II Tubulin ( Abpromise for all tested applications). Antigen: Synthetic peptide, CEEEEGEDEA found at the c-terminus of beta II tubulin. Entrez GeneID: 10383 ...
...
... with Annexin V-FITC to distinguish cells that ... (Annexin V positive, PI negative) from those ... or already dead (Annexin V-FITC positive, PI ... range of the spectrum using a 562-588 ...
... Mouse A-20 cells were cultured in RPMI ... the log phase of growth. In order ... cells were fixed in acetone-methanol. The cells ... coated slide, with each wells surface specifically treated ...
Biology Products: