Background: Mares are seasonal breeders, active in spring and summer when daylight is longer, ensuring foals are born in spring for ideal conditions. Having more foals in a breeding season is desirable for stud owners to improve their economic returns. Methods: Hormonal treatments with hCG and GnRH analogs can enhance fertility of mares inducing ovulation in follicles measuring over 35 mm in diameter, helping to synchronize and improve breeding. In the present study 100 indigenous mare breeds were selected from Khyber Pukhtunkhwa and Punjab province during February to October 2024-time period. They were divided in to 4 experimental groups based upon the hormone treatment given i.e. GnRH, HCG, GnRH and HCG combination and control groups. Result: The pregnancy rate owing to treatments used was significantly higher than the control group (p≤0.05), as determined by Chi-square analysis. The pregnancy rates were 60%, 68%, 72% and 32% for GnRH, HCG, GnRH and HCG and control groups respectively. No significant difference was observed between the first three treatment groups. Uterine edema was analyzed for its influence on pregnancy outcomes. The analysis using Spearman’s correlation revealed a correlation coefficient of -0.043 with a p-value of 0.691. This indicates statistically non-significant relationship between the degree of uterine edema and pregnancy outcomes between the treatment groups. These findings suggest that hormonal treatments may offer a promising approach to enhance fertility and conception rates in mares, particularly in indigenous breeds of Pakistan.
Khan et al. (Thu,) studied this question.
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