دراسة بعض العوامل المؤثرة في طول فترة الحمل عند الأفراس العربية في سورية

الملخص EN

The estimation of mare gestation length (GL) is important because of its relation to the breed and environment conditions.

The aim of this study was to estimate the Arabian mare GL,under the Syrian husbandry circumstances and study some environmental factors affected it.

The conception of 79 mares were looked to some Arabian horse stud farms in Rural Damascus/ Syria (Jerba, Gabraa, and Kharrat).

The observations were editing in spreadsheet Excel.

The data was analyzed statistically by SAS program.

The results showed that the effects of mating season, foal gender, race, mare color and age of mare at foaling were non-significant.

While the stud effect was highly significant on Arabian mare GL under husbandry conditions in Syria.

The overall mean of GL was 329.20 ± 11.42 days.

While estimation of GL were 342.42 ± 5.22, 329.71 ± 4.39, and 319.07 ± 5.61 days for Jerba, Gabraa, and Kharrat, respectively.

The study of environmental effects, such as year and month foaling, foal gender, mare age, and mare color under Syrian conditions, are very important for the good management of the pregnant mares, as this will reduce the difficult foaling resulted from long GL or the obtained weak foals of short GL.

So the study recommended that the mare which has less than 318 days/GL or more than 340 days/GL needsmore surveillance andmonitoring,as this will negatively affect the survival of the foal and the mare health at foaling