Assessment of the effect of three treatments to remove intrauterine fluid on pregnancy rate in the mare.

The research investigates how different treatments to remove intrauterine fluid impact the pregnancy rate in mares. The study found that a combination of oxytocin and antibiotics treatment resulted in the highest pregnancy rate.

Objective of the Research

• The research aimed to determine the effects of three different treatments used to clear out intrauterine fluid in mares on their chances of getting pregnant.

Methodology

• The researchers divided a total of 1267 mares into four groups, each receiving a different treatment after being mated.
• Group 1 was the control, receiving no treatment. The mares in Group 2 were treated with intrauterine infusion of broad-spectrum antibiotics. Group 3 received an intravenous injection of oxytocin. Group 4 was subjected to both oxytocin and antibiotics.
• Throughout the study, the pregnancy status of the mares was tracked by using transrectal ultrasonography 13 to 15 days and 27 to 30 days after ovulation.

Results and Conclusion

• The mares treated with both oxytocin and antibiotics (Group 4) exhibited the highest pregnancy rate of 72%, significantly higher than the rates of Group 2 (64%) and Group 3 (63%).
• The pregnancy rates of mares in Groups 2 and 3 were also found to be higher than that of the untreated control group (56%).
• The findings suggested that oxytocin and antibiotics treatments work together in two distinct ways to increase pregnancy rates: the antibiotics kill harmful bacteria while the oxytocin aids in draining the fluid.
• The researchers infer that the accumulation of more fluid in the uterine lumen after mating in the untreated mares is the most likely cause of their lower pregnancy rate.

Significance of the Study

• This research provides valuable insights for equine breeding processes by shedding light on the significant role of combined antibiotics and oxytocin treatments for improving pregnancy rates in mares.