Pheromones mediate social interactions among individuals in a wide variety of species, from yeast to mammals. In social insects such as honey bees, pheromone communication systems can be extraordinarily complex and serve to coordinate behaviors among many individuals. One of the primary mediators of social behavior and organization in honey bee colonies is queen pheromone, which is produced by ...

In this case, semen that handled by urethral catheterization was deposited into the deepest point of vagina an anesthetized queen. Intravaginal artificial insemination applied on 2nd day onset oestrus and only single performed. Insemination time determined behavioural cytological evaluations. Two healthy kittens were obtained 62 days after insemination. The case has important reports in terms b...

Göbek kordonunun gerçek düğümü, perinatal yönetimde nadir görülen bir anormalliktir ve obstetrisyenler için çoğunlukla korkulan durumdur. düğümü sıkılaştığında, gebelik haftasından bağımsız olarak fetal dolaşımın engellenmesine, gelişme geriliğine hatta intrauterin ölüme dahi yol açabilmektedir. Buna karşılık, göbek antenatal dönemde herhangi belirti vermeyebilir bebekler sağlıklı doğabilmekted...

The aim of this research was to estimate the influence of environmental factors, such as air temperature and milk production, on reproduction traits of primiparous Polish Holstein-Friesian cows. The following reproduction traits were considered: interval from calving to first insemination, interval from first to last insemination, interval from calving to conception, number of inseminations per...

In normal production practices, sows and gilts are inseminated at least twice during estrus because the timing of ovulation is variable relative to the onset of estrus. The objective of this study was to determine if a normal fertilization rate could be achieved with a single insemination of low sperm number given at a precise interval relative to ovulation. Gilts (n=59) were randomly assigned ...

The objective of the present field study was to establish the beneficial effects of re-insemination of non-pregnant cows using ultrasonography 20 to 23 days after the artificial insemination. A total of 245 Japanese Black cows were artificially inseminated and early pregnancy diagnosis (EPD) was performed on 92 cows 20 days after insemination, using ultrasonography. The remaining 153 cows were ...

The present study was performed to assess the fertility of frozen-thawed dog semen prepared by freezing with 6% glycerol and thawing at 70 degrees C for 8 sec, and to evaluate the least number of post-thaw spermatozoa necessary to achieve pregnancy by intrauterine or intratubal artificial insemination. It was found that the pregnancy rate of intrauterine artificial insemination was 100% using 6...

The objective was to determine whether granulocyte-macrophage colony-stimulating factor (GM-CSF) stimulates development of bovine embryos. In each experiment, oocytes were fertilized in vitro, GM-CSF was added to embryo culture medium at 8-10 h or 5 days after insemination, and development was monitored as the proportion of oocytes that formed blastocysts. Addition of recombinant bovine GM-CSF ...

Background: Due to the seasonality reproduction of albino hamster (April to October in the Northern Hemisphere) and the need to produce blastocysts for research applications, producing and collecting blastocysts by natural mating in non-breeding season is complex in this species. In the present study in vivo blastocysts production and collection using super-ovulation and intrauterine inseminati...