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After suffering an adverse fertility diagnosis for months that made pregnancy impossible, a Colombian Creole mare achieved pregnancy thanks to exhaustive reproductive and nutritional management applied by veterinarians and zootechnicians from the CES University of Medellín, which constitutes an advance for animal medicine in Colombia.

The obese mare with an indocial temperament, at the age of five years, began to be investigated for three years about possible endocrinological problems, this to find the reason why she had not managed to get pregnant before.

At the beginning of the investigation, veterinarians from the Animal Conditioning Center (CESAS) of the CES University of Medellín and Asdesilla began a treatment which consisted of changing the horse's diet and its management in general. Therefore, they began supplying grass, hay, water and mineralized salt to lower calories and improve their body condition and indocility. Then came the medical history review and new tests to pinpoint the cause of the fertility problem.

They had previously performed a karyotype. In its history it is dated that they tried to serve it with natural riding and artificial insemination repeatedly without any success. Maybe they thought at the time that he had a chromosomal problem. Through the result we realized that it was a supposed mare with Turner Syndrome, in which a chromosome is missing. From the sexual point of view they should be XX and this was XO with the difference that this animal cycled. Something never seen before”, Detailed Catalina Vélez Jaramillo, veterinary doctor of the Faculty of Veterinary Medicine and Zootechnics of the U. CES.

After the diagnosis, the veterinarians decided to perform a second karyotype examination in a laboratory at the National University in Bogotá. The result showed that the chromosome model was XX and not XO as the first report. Without being clear about the mare because she was not pregnant, Dr. Catalina Vélez decided to carry out a third examination.

Photo of a student of Veterinary Medicine and Zootechnics analyzing the leg of a horse, accompanied by his teacher

Photography: Office of Organizational Communication

In the third sample that was sent, it was found that the mare was Mosaic, that is, not all the cells of the body have the same number of chromosomes, but its mosaicism was in a low percentage as in 12%, it means that a percentage of those white blood cells were XXY and another percentage was XO and another XX, the highest percentage being XX which is normal, which gave a high probability of generating oocytes that were fertile”Added the doctor Vélez.

Once with the results and scientific analysis, the professionals decided to serve the mare, that is, to practice insemination, insisting on three types of horse to get her pregnant. The result surprised the owners and specialists.

The last check we did indicates that the pregnancy is normal, the fluids normal, the fetus in the size it should be, the heartbeat normal. For now we are doing well. He left CESAS continues with the same nutritional management, but is not mounting for competition”, Confirmed the CES University professional.

Currently the animal was removed from CESAS, located in the municipality of Rionegro, Oriente de Antioquia, to later continue with the gestation treatment, up to 11 months, and verify the evolution of the condition of the fetus as well.

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