Efecto comparativo de dos compuestos hormonales en la sincronización de celo en cerdas en la granja Santa Inés.

Abstract

This research study was conducted to compare the efficacy of two hormonal compounds, Regumate® (altrenogest) and Novormon5000® (equine chorionic gonadotropin), in synchronizing estrus in nulliparous and multiparous sows at Granja Santa Inés, part of the Technical University of Machala. Twenty breeding sows were used in a 2x2 factorial design, forming four experimental groups. Treatments were administered according to the established protocol: Regumate® orally for 18 days and Novormon5000® as a single intramuscular dose. The variables analyzed included vulvar coloration, vaginal discharge, response to the male effect, artificial mating, heat percentage, and treatment costs. The results indicated that Regumate® was 100% effective in both physiological groups, with estrus occurring synchronized on day 7 post-treatment. In contrast, Novormon5000® showed an overall efficacy of 40%, with a delayed response (day 12), and greater effectiveness in nulliparous sows (60%) than in multiparous sows (20%). Regarding the economic analysis, Regumate® cost $25 per sow, while Novormon5000® represented $12 per animal. However, the low efficacy of the second treatment made it a less profitable option. Statistical analysis showed significant differences between treatments. It is concluded that Regumate® is the most effective and cost-effective protocol for synchronizing estrus in sows under controlled conditions, allowing for planned and efficient reproductive management, with positive practical implications for the country's swine production systems.