Navigation Links
Reproductive life of male mice is increased by living with females

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
Society for the Study of Reproduction

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:
(Date:6/22/2016)... 22, 2016  The American College of Medical Genetics and ... Magazine as one of the fastest-growing trade shows during ... the Bellagio in Las Vegas . ... of growth in each of the following categories: net square ... number of attendees. The 2015 ACMG Annual Meeting was ranked ...
(Date:6/20/2016)... June 20, 2016 Securus Technologies, a ... solutions for public safety, investigation, corrections and monitoring ... involved, it has secured the final acceptance by ... for Managed Access Systems (MAS) installed. Furthermore, Securus ... to be installed by October, 2016. MAS distinguishes ...
(Date:6/9/2016)... 2016 Paris Police Prefecture ... security solution to ensure the safety of people and operations ... the major tournament Teleste, an international technology group ... announced today that its video security solution will be utilised ... up public safety across the country. The system roll-out is ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... ... June 27, 2016 , ... Rolf K. Hoffmann, former senior ... the University of North Carolina Kenan-Flagler Business School effective June 27. ... Kenan-Flagler, with a focus on the school’s international efforts, leading classes and participating ...
(Date:6/27/2016)... BOSTON , June 27, 2016   Ginkgo ... biology to industrial engineering, was today awarded as ... a selection of the world,s most innovative companies. ... at scale for the real world in the ... organism engineers work directly with customers including Fortune ...
(Date:6/24/2016)... SAN DIEGO , June 24, 2016 /PRNewswire/ ... that more sensitively detects cancers susceptible to PARP ... individual circulating tumor cells (CTCs). The new test ... of HRD-targeted therapeutics in multiple cancer types. ... therapies targeting DNA damage response pathways, including PARP, ...
(Date:6/24/2016)... ... ... Researchers at the Universita Politecnica delle Marche in Ancona combed medical journal articles ... findings are the subject of a new article on the Surviving Mesothelioma website. ... blood, lung fluid or tissue of mesothelioma patients that can help point doctors to ...
Breaking Biology Technology: