Fertility after fetotomy: a clinical study focusing on heavy draft mares.

The research studies the effect of fetotomy (a veterinary procedure used to extract a dead or problematic fetus from a mare) on the fertility of heavy draft mares. The results indicate that most of these mares continue to cycle normally after the procedure, although the pregnancy rate in the first subsequent breeding season is significantly reduced.

Research Overview

This study primarily focused on the incidence, indications and impact of fetotomy on the survival and further fertility of heavy draft mares. The researchers examined medical records of 102 mares who underwent fetotomy, with a majority being heavy draft mares (93 out of 102).

• The primary reason for fetotomy was head malposture in the fetus which occurred in 62.7% of the cases.
• The survival rate of these mares after the procedure was noted to be 84.3%.
• Postpartum complications witnessed were mainly endometritis puerperalis (inflammation of the uterus after delivery) at 32.5% and retained placenta at 27.9%.
• Subsequent fertility, foal heat (first ovulatory period after foaling) and regular cycling in the first season after fetotomy, was observed in 70.9% of the cases.
• However, only 31.1% of the mares that were bred in the first season post-fetotomy were able to become pregnant.

Key Findings and Interpretations

The research highlighted several key outcomes about fetotomy and its impact on heavy draft mares.

• The procedure seems justified when dealing with serious fetal malpositions like head malposture where the foal’s head is not properly positioned for birth. The success rate is relatively high, considering up to 84.3% of the mares who underwent this procedure survived.
• Postpartum complications, such as endometritis puerperalis and retained placenta, were relatively common. These may impact general health and further breeding capabilities of the mares.
• A vast majority of the mares were able to show normal cyclicity after the procedure, indicating that it does not significantly disrupt the reproductive cycles of the mares.
• However, the first season pregnancy rate post-fetotomy was low, indicating that while the mares’ reproductive cycle does resume, the chances of successful conception immediately after the surgery are relatively low.
• The study also suggested that delayed veterinary assistance due to economic reasons tends to have a negative impact on the survival rate and further fertility of the mares.

Conclusion

In conclusion, the research defines fetotomy as a viable option for serious maldispositions, especially head malpostures. The survival rate is high, and it permits the mares to go back to breeding in the same season. However, prompt veterinary assistance is necessary for the best outcomes. Despite initial fertility challenges, it doesn’t halt the continuation of the reproductive cycle. Future research could focus on possible interventions to improve the post-fetotomy pregnancy rate.