Abstract

PEREZ GUERRA, Uri Harold et al. Caracterization ultrasonographic B-mode and Doppler of the corpus luteum in llamas. J.Selva Andina Anim. Sci. [online]. 2021, vol.8, n.1, pp.3-11. ISSN 2311-3766.

Mode B and Doppler ultrasonography in ruminants, as a technique, has allowed establishing new concepts on the reproductive physiology of females, through the study of follicular dynamics and morphometry of the corpus luteum, therefore, the objective was to characterize using mode B ultrasound and Doppler the corpus luteum in recipients’ llamas. 37 llamas were used as recipients (27 for mode B and 10 Doppler ultrasound) that were synchronized by applying buserelin acetate 0.0096 mg, nine days later 0.048 mg of Prostaglandin F2α analog was applied, two days later the second dose of buserelin acetate in the same dose to a ovulation and subsequent formation of the corpus luteum, The B-mode evaluation of the morphometry consisted of observing the ecotexture, area, diameter and volume of the corpus luteum with the use of a SonoStar SS-8^® ultrasound machine at 6.5 MHz frequency and 6 cm depth equipped with a transrectal linear transducer, with the same technique with a Draminski 4Vet^® Doppler device, the percentage of luteal area of vascularization (% AVL) was determined. The data were subjected to a descriptive analysis, being 0.119±0.032 cm² in area, 12.7±1.7 mm in diameter and 0.84±0.32 cm³ in volumen of CL, to determine the relationship between metric measurements the Pearson correlation was used observing a positive relationship between area/diameter of 0.7506, area/volume of 0.9289 and diameter/volume of 0.6602, observing a high positive correlation between area and volume, finally, the characteristics of % AVL was 34.97 for the CLs of recipients llamas. In conclusion, the morphometric characteristics evaluated in mode B (area, diameter, and volume) have a positive correlation and the % AVL could be applied as a tool in efficient reproductive management for the selection of receptors in camelids, understanding that it is one of the first reports of these characteristics in llamas.

Keywords : Corpus luteum; Doppler; llama; morphometric; pregnancy; ultrasonography.

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