Niveles de la hormona antimülleriana sobre la tasa de preñez en vacas brahman tratadas con un protocolo de inseminación artificial

This study consisted of evaluating the levels of the Antimüllerian Hormone on the pregnancy rate in Brahman cows treated with a fixed-time Artificial Insemination protocol (IATF). A descriptive study was implemented that measured the follicular size of luteal bodies, ovarian and pregnancy rate. Twenty-one Brahman cows were tested and sampled at the foot of> 3 deliveries, with body condition 3.5 (scale 1 to 5). The experimental units were grouped into three groups corresponding to three ranges of concentration range: AMH 0 to 220 ρg; AMH range 220 to 305 ρg and AMH range> 305 ρg. The data were analyzed with the statistical package SPSS for analysis of variance with P value <0.05. The study showed that AMH ranges influence the ovarian dynamics of Brahman cows treated with the (IATF) protocol. Animals with AMH ranges greater than 305 ρg / mL recorded an increase in dominant follicles (2 to 4 mm) (P≤0.001). Through logistic regression analysis, it was found that there is no relationship between the AMH ranges of empty and pregnant cows. A 52.4% chance of pregnancy was achieved when high plasma levels of AMH are found and an omnibus test with the model coefficients warned of a certain range of statistical efficiency in predicting the probability of pregnancy occurrence (Chi square 19.50; P <0.001) and a Wald significance and validity test below 0.01, which denotes a weak correlation between the variables studied. 43.0% pregnancy was confirmed in each range.

• Main Author: Zambrano Mendoza, Johe Sebastián (author)
• Other Authors: Zambrano Vélez, Cristhian Alberto (author)
• Format: bachelorThesis
• Language: spa
• Published: 2019
• Subjects: Folículo; Dinámica ovárica; Fertilidad; Regresión logística
• Online Access: http://repositorio.espam.edu.ec/handle/42000/1158