The hen's reproductive system can be divided into two major components: Dehydration results in hyperosmotic environment because cellular substances diffuse out of the cells and disturb the metabolism process 4. The results obtained in this study showed that the use of semen from high performing HP cocks following five minutes of sexual massage is a practical method for optimising sperm viability and the subsequent fertility in hens. After sperm leave the testes, they enter the epididymis, where they gain the ability to swim. Reproductive performance tests as determined by the number of ejaculations per five minutes of abdominal sexual massage 5ASM were used to select 16 high performing HP and 16 low performing LP cocks from a population of 80 cocks. In this study, we were unable to produce fertilized eggs by artificial insemination of the female birds using in vitro stored sperm, indicating that sperm preservation requires unknown factor s other than lactic acid. Laser microdissection was carried out by T.
The golden secrets of male fertility
The flexible pin bones either side of the vent will be easily felt if the hen is not too fat and three finger-widths apart if a large breed hen is laying. An average breeding ratio is one male to four females. Possible causes of subfertility in hens following insemination near the time of oviposition. The male has papillae in its cloacal wall which spray the sperm onto the cloacal wall of the female. However, fertilizing ability in chicken that are inseminated with frozen sperm and how the spermatozoa from frozen semen survive in female reproductive tract also are still unknown. Survivability of DMA cryopreserved sperm in the female reproductive tract of inseminated hen up to 21 days.
NADIS - National Animal Disease Information Service -
Post mortem examination and culture is again useful. Services on Demand Article. Sexual selection and the temporal separation of reproductive events: This example illustrates how fertility must be very good to get above average hatchability and hatch bonus pay. Though it has been shown that a majority of female insect species can store sperm, specific examples that have been studied could include field crickets,  dung flies  and Mediterranean fruit flies. Stress can result in the occasional odd-shaped egg, especially those with an equatorial bulge, which results from rough handling of the bird. This movement of the spermatheca results in spermatozoa migration into the spermathecal duct and into the spermatheca reservoir.