influence of foal heat oxytocin injection with or without lunging in foal heat on conception rate in mares with intrauterine fluid accumulation

ABSTRACT

To study the effect of oxytocin injection and also oxytocin plus lunging on intrauterine fluid reduction and conception rate in mares with intrauterine fluid accumulation. Experimental study. A total of 45 mares, 8-14 years old. Among the mares in foal heat, 45 mares with more than 1 cm2 fluid in their uterus [evaluated by ultrasonography] were selected and categorized randomly in 3 groups as follow Group 1 Without treatment [control]. N=17. Group 2 Oxytocin injection [15 iu, IV], one daily, up to the end of foal heat [first injection on the 2[nd]day of foal heat]. N=14. Group 3 Treatment as group 2 plus lunging for 20-30 minutes, initiated 60 minutes after oxytocin injection [to evaluate the effect of lunging in association with oxytocin on uterine drainage]. N=14 Results: Reduction of uterine fluid after treatment was 71.4% and 98.9% in group 2 and 3 respectively compared with 17.6% in control group [P<0.05]. The total conception rate in 3 groups with uterine fluid less than 1 cm[2][61.5%] was significantly more than the total one in 3 groups with uterine fluid > 1 cm[2][26.3%][P<0.05]. Lunging and or oxytocin injection in mares with intrauterine fluid accumulation in foal heat can improve conception rate in next estrus