31/05/2024
HERMAPHRODITISM IN HORSES
Hermaphroditism is a very rare condition where a horse is born with both male and female reproductive organs. This can be a complex medical issue, often discovered during routine veterinary exams or when unusual behaviour or physical traits are noticed.
We were contacted when one of our wonderful clients noticed their pony was displaying ‘stallion like’ behaviour around mares and when being handled, even though they were under the impression she was a mare. Tahiyya, our head equine veterinarian surgeon, went out to examine the pony and found she (arguably also a he!) had external female and male reproductive organs but then also internal male reproductive organs resulting in extremely high testosterone levels in the blood.
Our visiting surgeon Bryan then came to our clinic to laparoscopically remove two testicles that were in the abdomen.
Within a few days after the surgery, our clinical team had already began to notice a huge difference in her behaviour.
The ponies recovery was smooth and uneventful so was discharged. This now meant that ‘she’, even though still a hermaphrodite, could go on to lead a normal and happy life being turned out with both mares and geldings.
Signs:
• Ambiguous external genitalia
• Behaviour typical of the opposite s*x
• Infertility or difficulty in breeding
Diagnosis:
• Physical examination
• Hormonal tests
• Ultrasound
• Genetic testing
Treatment and Management:
While there is no one-size-fits-all treatment, options may include:
• Surgical intervention to remove one set of reproductive organs
• Hormonal therapy
• Ongoing veterinary care to monitor health and behaviour
Risks of Owning a Hermaphrodite Horse:
While these horses can live healthy lives, there are some risks and challenges to be aware of:
⚠️ Health Complications:
Increased risk of infections or medical issues related to the reproductive organs.
Potential for hormonal imbalances that could affect overall health
⚠️ Behavioural Issues:
Possible behavioural problems due to hormonal inconsistencies, such as aggression or unusual mating behaviours.
⚠️ Breeding Challenges:
Infertility or complications in breeding programs. Horses with hermaphroditism are often sterile, which can affect breeding plans.
Hermaphroditism in horses is extremely rare. While exact statistics are hard to come by, it is estimated that this condition occurs in a very small fraction of the equine population. Most horse owners and breeders may never encounter it, which makes awareness and understanding even more crucial so if you have any concerns or questions about any of the points raised above then please feel free to get in contact with us!
Thank you to the owners for letting us sharing their story! 🐴