The Effects of Gnrh Injection After Intravaginal Sponge, Cidr-G and Ear Implant Application in Coloured Mohair Goats During Early Anoestrus Season

Abstract

In the present, in the Colored Mohair Goats, during anoestrus season, vaginal sponge, CIDR-G and ear implants used to stimulate oestrus and additionally GnRH injection. In this study 57 female and 12 male coloured mohair goats aged between 2-4 year old were used. The goats were divided randomly into three equal groups. To the 1st group (n=19), 30 mg Flourogestone acetate (FGA) containing sponge applied for intravaginally for 14 days. The day sponges removed, 300 IU eCG were applied. To the 2nd group (n=19), 0.3 g P4 containing implants (CIDR-G) were applied for intravaginally for 13 days. The day implants removed, 300 IU eCG were injected. To the 3th group (n=19), the day implants applied, 5 mg oestradiol valerate and 3 mg norgestomet were injected intramuscularly and 3 mg ear implant were applied during 10 days. The day implants removed, 300 IU eCG were injected. Goats in group I, II and III showing oestrus symptoms were divided into 2 subgroups. Twelve days after mating 1 ml GnRH (25 mg Lesireline acetate) (group IA, group IIA, group IIIA) and other groups 1 ml serum phsiologic (group IB, group IIB, group IIIB) were injected. Pregnancy ratios in group IA were 60%, group IB 25%, group IIA 80%, group IIB 25%, and group IIIA 33.33%. On the other hand, in group IIIB no pregnancy were observed. GnRH injected 10 goats in group IA, 6 of them 10 goats in group IIA, 8 of them, 9 goats in group III, 3 of them were observed to be pregnant. As a result, at early oestrus season stimulation of oestrus by three different method were effective in coloured mohair goats, vaginal sponges containing FGA and P4 containing CIDR-G cause to develope oestrus early. FGA containing vaginal sponge, P4 containing CIDR-G and norgestomet containing crestar ear implant application and 12 days these aplication, GnRH injection had a positive effect on pregnancy rate.