Japanese Journal of Veterinary Research;Volume 65 Number 1

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Ameliorative effects of exogenous gonadotropins on reproductive profiles of replacement gilts with delayed puberty in a farm in Thailand

Am-In, Nutthee;Roongsitthichai, Atthaporn

Permalink : http://hdl.handle.net/2115/64785
JaLCDOI : 10.14943/jjvr.65.1.45
KEYWORDS : delayed puberty;gilts;gonadotropins

Abstract

This study was to investigate the effect of gonadotropins on reproductive profiles of replacement gilts with delayed puberty. Totally, 136 Landrace × Yorkshire crossbred gilts, were categorized into control (n = 58) and treatment (n = 78) groups. Gonadotropins (400 U eCG plus 200 IU hCG) were administered in treatment group only. The results revealed that gilts in treatment group had higher number of gilts with estrus (92.3 vs 25.9%, P < 0.001), shorter onset to estrus (4.7 ± 0.3 vs 9.0 ± 0.8 d, P < 0.001), higher number of dominant follicles (18.0 ± 0.2 vs 13.2 ± 0.3 follicles, P < 0.001), and higher farrowing rate (87.5 vs 53.3%, P = 0.002) than those in control group. In conclusion, gonadotropins containing 400 IU eCG plus 200 IU hCG could improve reproductive profiles in replacement gilts with delayed puberty.

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