Histrelin acetate-induced ovulation in Brazilian Northeastern jennies (Equus asinus) with different follicle diameters
| Autor: | Sidnei Nunes de Oliveira, José Antônio Dell'aqua Junior, Antonio de Lisboa Ribeiro Filho, Frederico Ozanam Papa, Lucas Emanuel Ferreira Canuto, Lorenzo G.T.M. Segabinazzi, Patricia M. Papa, Mariana Werneck Fonseca |
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| Přispěvatelé: | Universidade Estadual Paulista (Unesp), Universidade Federal da Bahia (UFBA) |
| Rok vydání: | 2019 |
| Předmět: |
Ovulation
medicine.medical_treatment media_common.quotation_subject Donkeys Cycle manipulation Gonadotropin-Releasing Hormone Andrology 03 medical and health sciences Follicle 0302 clinical medicine Ovarian Follicle Food Animals Induced ovulation Follicular phase medicine Animals Histrelin Acetate Small Animals media_common Estrous cycle 030219 obstetrics & reproductive medicine Equine business.industry Reproduction 0402 animal and dairy science Equidae 04 agricultural and veterinary sciences 040201 dairy & animal science GnRH Female Animal Science and Zoology Ovulation induction business Brazil |
| Zdroj: | Scopus Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| ISSN: | 0093-691X |
| Popis: | Made available in DSpace on 2019-10-06T17:13:02Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-09-15 Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) The aim of the present study was to evaluate the efficacy of a GnRH analog for induction of ovulation in Brazilian Northeastern jennies (Equus asinus) with different follicle diameters. Four consecutive estrus of 10 jennies were used in a crossover study; C (Control, n = 10) jennies were evaluated by transrectal palpation and ultrasonography until a spontaneous ovulation and the intervals between the predetermined follicular size (25–28 mm [C1], 29–32 mm [C2] and 33–36 mm [C3] follicle) and ovulation were registered. In treated cycle, jennies had the ovulation induced by 250 μg of Histrelin acetate (Strelin®, Botupharma, Botucatu, Brazil) when respective follicle diameters 25–28 mm (T1), 29–32 mm (T2) and 33–36 mm (T3) were diagnosed. Ovulation was monitored by transrectal palpation and ultrasonography. Different follicle diameters significantly affected (P < 0.05) the interval until ovulation between control and matched treated cycles. Interval between prostaglandin administration and ovulation diagnosis was lower in jennies from T2 group (145.2 ± 34.6 h) compared with the control cycle (220.0 ± 41.8 h) and also with other treated cycles (T1 - 209.8 ± 48.0 h; T3 – 183.3 ± 33.9 h). Histrelin acetate treatment also reduces the interval between detection of predetermined follicular size and ovulation (P < 0.05) in all treated cycles groups compared with matched control group. Higher percentage (P < 0.05) of jennies had success of ovulation induction (36–48 h after Histrelin acetate injection) in all treated cycles in contrast with the matched control group. In addition, in comparison among treated cycle groups, more (P < 0.05) jennies (100%) in T2 ovulated between 36 and 48 h after ovulation induction, compared with T1 and T3, which did not differ (P > 0.05) from each other. Edema scoring and ovulation were not associated events (r = 0.0219). In conclusion, jennies with 29–32 mm follicles satisfactory responded to ovulation induction with Histrelin acetate, which allowed the shortening of interovulatory interval in all groups evaluated. Sao Paulo State University (UNESP) School of Veterinary Medicine and Animal Science Federal University of Bahia (UFBA) Sao Paulo State University (UNESP) School of Veterinary Medicine and Animal Science |
| Databáze: | OpenAIRE |
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