Geçiş Döneminin Sonundaki Nullipar Saanen Keçilerinde Farklı Progesteron Analogları ve GnRH Uygulamalarının Reprodüktif Parametreler Üzerine Etkinliği

The objective of this study was to compare the efficacy of diff erent estrus synchronization protocols on reproductive parameters in nulliparous Saanen goats at the end of the transition period. In this experiment, 71 nulliparous Saanen does were used and divided into four treatment groups as norgestomet implant plus GnRH (Imp-G), norgestomet implant (Imp), FGA sponge plus GnRH (Spo-G), and FGA sponge (Spo). The progestagen treatments were administered for 11 days. At progestagen withdrawal, all does were injected with 360 IU of eCG and 125 μg of PGF2α. At the end of the treatments, all the does were joined with fertile bucks. There were no significant diff erences (P>0.05) in reproductive parameters among the treatments groups. Does were in estrus within 29.2±0.36 h for all the treatments combined. It was concluded that, the use of norgestomet implants and FGA sponges in combination with eCG and PGF2α were eff ective for estrus response, onset of estrus, fecundity, prolificacy, and fertility in nulliparous Saanen does at an age of 7-9 months under local conditions at the end of the transition period also GnRH was found to be ineff ective in increasing the reproductive parameters.