Navigation Links
Reproductive life of male mice is increased by living with females
Date:1/22/2009

Living with a female of its species can extend the reproductive life of a male mouse by a dramatic 20 percent, according to a study reported at the online site of the journal Biology of Reproduction.

In the research, conducted by a team at the University of Pennsylvania School of Veterinary Medicine, male mice were housed with or without female mice for 16 to 32 months. Each male was placed with two novel females at 2-month intervals to test its ability to impregnate the females.

The team, headed by Dr. Ralph Brinster, found that males housed with females did not show a drop in fertility until 32 months of age a 6-month increase in fertility over males housed alone.

The study also concluded that once fertility began to decrease, the rate of decrease was the same for both groups of males. The decline in fertility appeared to be due in part to defects in the sperm production process.

The researchers postulate that a female housed with a male mouse delays reproductive aging by affecting the cells surrounding the stem cells that produce spermatozoa in the testes.

The effect on the environment of the sprematogonial stem cells likely occurs through the male's endocrine and nervous systems, the scientists theorize.

"Whether this female influence occurs in other species is not known," Dr. Brinster notes.

If the effect is found to extend to other species, however, the authors point out that a 20 percent increase in male fertility could mean an extension of the male reproductive life span of years for various livestock animals and even decades for some large endangered species.


'/>"/>

Contact: Ralph Brinster
cpope@vet.upenn.edu
Society for the Study of Reproduction
Source:Eurekalert

Page: 1

Related biology news :

1. Study finds Viagra increases release of key reproductive hormone
2. Study identifies pathway required for normal reproductive development
3. Physician-scientists seek solutions to reproductive problems related to chromosomal variations
4. Reproductive plasticity revealed: Neotropical treefrog can choose to lay eggs in water or on land
5. W.M. Keck Foundation grant funds reproductive science research
6. New study shows compounds from soy affect brain and reproductive development
7. Trends in prescription medication sharing among reproductive-aged women
8. Rutgers scholar authors definitive biography of reproductive medicine pioneer
9. Exposing chicks to maternal stress leads to long-term reproductive success
10. In many fungi, reproductive spores are remarkably aerodynamic
11. Western diet linked to increased risk of colon cancer recurrence
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/27/2017)... CENTRE, N.Y. , March 27, 2017 /PRNewswire-USNewswire/ ... Healthcare Information and Management Systems Society (HIMSS) Analytics ... Outpatient EMR Adoption Model sm . In addition, ... 12% of U.S. hospitals using an electronic medical ... CHS for its high level of EMR usage ...
(Date:3/24/2017)... DUBLIN , Mar 24, 2017 Research ... Vehicle Access System Market Analysis & Trends - Industry Forecast to ... ... poised to grow at a CAGR of around 15.1% over the ... This industry report analyzes the market estimates and forecasts for ...
(Date:3/23/2017)... -- Research and Markets has announced the addition of ... Industry Forecast to 2025" report to their offering. ... The Global Vehicle Anti-Theft ... 8.8% over the next decade to reach approximately $14.21 billion by ... and forecasts for all the given segments on global as well ...
Breaking Biology News(10 mins):
(Date:10/11/2017)... (PRWEB) , ... October 11, 2017 , ... ... compared the implantation and pregnancy rates in frozen and fresh in vitro ... of progesterone and maternal age to IVF success. , After comparing the results ...
(Date:10/10/2017)... , ... October 10, 2017 , ... San Diego-based team ... its corporate rebranding initiative announced today. The bold new look is part of ... the company moves into a significant growth period. , It will also expand its ...
(Date:10/10/2017)... ... October 10, 2017 , ... For the second time ... US2020 STEM Mentoring Award. Representatives of the FirstHand program travelled to Washington, D.C. ... US2020. , US2020’s mission is to change the trajectory of STEM education in ...
(Date:10/10/2017)... , Oct. 10, 2017 International research firm Parks Associates ... will speak at the TMA 2017 Annual Meeting , October 11 ... in the residential home security market and how smart safety and security ... Parks Associates: ... "The residential security ...
Breaking Biology Technology: