Descriptions of reproductive behavior of equids under free-running conditions are available in a number of resources.* These can be very instructive toward understanding the basic nature of stallions and how behavior varies under domestic breeding conditions. Most domestic stallions are handled under halter for live breeding or collection of semen. As opposed to the full complement of harem for...

Study objectives were to; 1) determine if supplementing of n-3 fatty acids improves membrane integrity, and hence viability and motility of stallion spermatozoa following cold storage, and following cryopreservation, and 2) determine if n-3 supplementation alters the fatty acid composition of stallion spermatozoa. Data indicate that following 90 d of n-3 supplementation daily sperm output and t...

A receptive uterine environment is a key component in determining a successful reproductive outcome. We tested the hypothesis that endometrial gene expression patterns differ in fertile and subfertile dairy cow strains. Twelve lactating dairy cattle of strains characterized as having fertile (n = 6) and subfertile (n = 6) phenotypes underwent embryo transfer on day 7 of the reproductive cycle. ...

Thirty-two stallions were used to determine the effect of anabolic steroids on reproductive function. Stallions were assigned to one of the four treatments: 1) .23 ml sesame oil/kg of body weight (BW; control, C); 2) 4.4 mg boldenone undecylenate/kg BW (4E); 3) 1.1 mg boldenone undecylenate/kg BW (1E) and 4) 1.1 mg nandrolone decanoate/kg BW (D). Injections were given at 3-wk intervals for 15 w...

AIM To investigate various biochemical components of seminal plasma in Marwari stallions and Poitou Jacks and to find out their correlation with that of the seminal characteristics. MATERIALS AND METHODS In this study, semen was collected from six Marwari stallions and six Poitou jacks aged from 4 to 6 years and with known fertility status. The semen collection from the stallions were collect...

The aim of this study was to test the integration of external information, i.e. foreign estimated breeding values (EBV) and the associated reliabilities (REL), for stallions into the Belgian genetic evaluation for jumping horses. The Belgian model is a bivariate repeatability Best Linear Unbiased Prediction animal model only based on Belgian performances, while Belgian breeders import horses fr...

The aim of the present study was to investigate the differences related to age ad gender in some blood parameters of Arabian horses bred in Turkey. In this study, 12 mares, 10 stallions, 90 foals (5 to 6 months old), and 35 yearlings were used. it was indicated that total erythrocyte count (RBC) and leukocyte count (WBC) was in normal ranges for mares and stallions while RBC and WBC values were...

background: phospholipids are distributed asymmetrically between inner and outer leaflets of the plasma membrane of live cells. early during apoptosis, this asymmetry is disrupted and phosphatidylserine becomes exposed on the outside surface of the plasma membrane. there is little information about the effects of vitrification on apoptosis. objective: the aim of the present study was to evaluat...

Male infertility is caused by many factors including genetics. Although part of genetic damages are inherited and could be traced in blood leukocytes, but those de novo alterations induced in spermatogenesis are not part of diagnostic work up. De novo alterations might be the cause of many idiopathic conditions of male infertility. The aim of this study was to evaluate DNA damage, sex chromosom...

Considerable variation exists in the level of spermatogenic efficiency present in similar sized testes of stallions #3 years of age. Results of 53 breeding soundness examinations of 3-year-old stallions composed of 8 breeds were compiled and demonstrated that scrotal width was only moderately correlated with parameters of semen quality in first or second ejaculates. Equine practitioners should ...