Evaluación del uso de esponjas artesanales de alta densidad en protocolos de IATF en bovinos Holstein Friesian mestizos

Abstract

The objective of this research was to evaluate two estrus synchronization systems in Holstein Friesian cattle females to be served by IATF, for this purpose, 18 females of this breed were assessed, with a body condition of 2.5 to 3, using the CIDR - Ovsych protocol for estrus synchronization. In addition, four treatments with three animals each were carried out. The distribution was developed as follows: treatment 0 (CIDR), treatment 1 sponge density 25 + 60 mg of medroxyprogesterone acetate “MAP”, treatment 2 sponge density 25 + 50 mg MAP, treatment 3 sponge density 40 + 60 mg MAP and treatment 4 sponge density 40 + 50 mg MAP. The variables studied were sponge density, sponge quality, weight gain, bacterial microbiota, cervical mucus quality and pregnancy rate. The results showed that T0 and T2 have better pregnancy rates; likewise, T0 has better vaginal mucus characteristics, less contamination and has less bacterial proliferation. It should be emphasized that a more significant number of animals are needed for experimentation for the data to be more meaningful. Key words: CIDR, sponges, MAP, pregnancy index.