TY - JOUR AU - Andino, P. AU - Caiza, F. AU - Condo, L. AU - Diaz, H. AU - Reyes, F. AU - Oleas, E. AU - Vargas, J. AU - Marini, P. R. PY - 2016/01/04 Y2 - 2024/03/28 TI - Assessment of Two Superovulation Programs in Dairy Cows in the Ecuadorian Central Highlands JF - Asian Journal of Agriculture and Food Sciences JA - AJAFS VL - 3 IS - 6 SE - Articles DO - UR - https://www.ajouronline.com/index.php/AJAFS/article/view/3267 SP - AB - <p>In different dairy farms in the Ecuadorian Central Highlands, we assessed the effect of superovulation in dairy cows of different breeds based on intravaginal device implants P4 (DIB) + EB additional to the application or not of GnRH during the 1st Artificial Insemination (AI), using 24 dairy cows, each being an experimental unit and distributed under a completely randomized design (CRD), the experimental results were subjected to Chi-squared (X²) and Students’ t tests to compare the effect of treatments. Determining that the superovulation programs used showed statistically similar responses, however, cows receiving GnRH showed a greater number of animals superovulating (91.7 % vs. 83.3 %), the highest total number of structures collected 10.7<span style="text-decoration: underline;">+</span>7.0 vs 8.4 <span style="text-decoration: underline;">+</span>4.1 per cow and viable embryos 9.4<span style="text-decoration: underline;">+</span>6.1 vs 7.1<span style="text-decoration: underline;">+</span>3.5 cow, corresponding to 87.30 % and 84.50 % respectively. Breed had a direct influence on the assessed parameters. It’s recommended to induce superovulation with intravaginal implants P4 (DIB) + EB plus the application of GnRH during the first artificial insemination to improve the quantity and quality of embryos to collect.</p> ER -