Abstract
The application of modern biotechnologies in equine reproduction, including embryo transfer and artificial insemination, requires strict control of the estrous cycle. The peculiarities of the reproductive physiology of horses, such as seasonal reproductive activity and the prolonged and very variable duration of heat in cyclic mares, make it very important to detect the optimal moment of mating or insemination. In the cow, the optimal moment of insemination can be observed with some ease, due to the short duration of heat, assuming its correct observation. In the equine such procedure is not possible, that is, the mare usually needs to be mated more than once during heat or the coverage/insemination has to be determined by the veterinarian through transrectal follicular control, so the present work aims to show the evolution of pharmacological treatments and clarify at what stage the biotechnological tool known as fixed-time artificial insemination (TAI) is.
DOI: https://doi.org/10.56238/sevened2024.031-094