Data di Pubblicazione:
2007
Citazione:
Efficacy of hCG and GnRH for inducing ovulation in the jenny / A. Carluccio, S. Panzani, U. Tosi, M. Faustini, I. De Amicis, M.C. Veronesi. - In: THERIOGENOLOGY. - ISSN 0093-691X. - 68:6(2007), pp. 914-919.
Abstract:
Knowledge about management of ovulation in the donkey is limited compared to that in the horse. This experiment was designed
to evaluate the efficacy of injecting single doses of lecirelin (a GnRH-analogue) or of hCG to induce ovulation in the jenny and to
determine whether effects are dependent upon follicular diameter at time of injection. Ovarian activity and follicular growth were
monitored by rectal ultrasonography. Jennies were randomly allotted to the following groups: Group GnRH, treated with 100 mg
lecirelin; Group hCG, treated with 2500 IU hCG; Group C, untreated and monitored for spontaneous ovulation. Animals were also
categorized into subgroups depending upon follicular diameter: 30–35 mm (GnRH-1, hCG-1 and C-1) or 36–40 mm (GnRH-2,
hCG-2 and C-2). Jennies in the two hormone treatment groups did not differ significantly for time from treatment to ovulation, but
there was a significant reduction in time to ovulation as follicle size at treatment increased. Jennies treated with either lecirelin or
hCG had significantly smaller follicle size at ovulation than jennies in the Control groups that underwent spontaneous ovulation.
Treatment groups did not differ significantly in the proportion of jennies that ovulated within 48 h of injection or between 25 and
48 h following injection. These results highlight the usefulness of lecirelin for induction and synchronization of ovulation in the
jenny, particularly since it would avoid the risk of reduced hCG response in reproductive management programs in which that
hormone was repeatedly used.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Jenny ; Ovulation induction ; hCG ; GnRH
Elenco autori:
A. Carluccio, S. Panzani, U. Tosi, M. Faustini, I. De Amicis, M.C. Veronesi
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