Induction of ovulation in quarter horse mares through the use of deslorelin acetate and human chorionic gonadotrophin (hCG)

Brazilian Archives of Biology and Technology

Tatiana Figueiredo¹  Roman Paiva²  Luiz Ernandes Kozicki²  Fernanda Kaercher¹  Romildo Romualdo Weiss²  Ivo Walter Dos Santos²  Priscilla Ricabone Muradas² 

[1] ,Pontifícia Universidade Católica do ParanáSão José dos Pinhais PR ,Brasil

关键词: ovulation;    deslorelin acetate;    human chorionic gonadotrophin;    quarter horse mares;   

DOI  :  10.1590/S1516-89132011000300012

来源: SciELO

【 摘 要 】

The aim this study was to compare two protocols of induction for ovulation by desloreline acetate and hCG in Quarter Horse mares. The choice of the animals was based on the observations by the estrus, by rectal palpation of the ovaries and by ultrassonography of the follicular dynamics. After estrus detection and follicle control, the measurement of the follicles and the classification of uterus were carried out. The animals that had dominant follicle (diameter more than 35 mm) and swollen uterus were used. In these conditions, the mares received hCG or desloreline acetate. Once ovulation occurred, the artificial insemination was carried. Two groups were performed: G1 (20 animals) received 1.5 mg desloreline acetate and G2 (20 animals) received 1700 IU of hCG. Following 6h intervals, the control follicular was performed by ultrasonography. The follicular average diameter was 42.6 cm for the groups and set up a score of 0 to 3 of uterine edema displayed by the device as well as the time of ovulation. In conclusion, the desloreline acetate showed better performance than hCG, because the ovulation was induced in less time (nine hours than hCG) (p<0.05).The pregnancy rate was 80 and 75 %, respectively in G1 and G2.

【 授权许可】

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