Effect on fertility of PMSG applications in different doses in addition to flushing in Kivircik ewes

In this study, flushing and different doses of pregnant mare serum gonadotrophin (PMSG) application in addition to this in Kivircik Sheep was reviewed on reproductive performance. Research material consisted of 100 head Kivircik sheep that have given birth one time before. The herd was divided into four groups which have equal sheep (n= 25). Flushing was applied to every group, 3 groups other than one group were additionally applied intravaginal 20 mg flourogestone acetate (FGA) and then 300, 400 and 500 IU pregnant mare serum gonadotrophin (PMSG). Estrouses in the groups were observed at 34.86±1.73, 31.91±1.63, 36.67±1.69 and 45.76±1.70 hours and the observed differences were found significant (P<0.001). While the rate of pregnancy were found 100% in every group; fertility, flushing (100%) and flushing+PMSG 500 IU (100%) were found higher than the other groups. No difference was observed among the groups in terms of multiple birthrate, number of lambs per sheep and vitality. It was determined that there was no statistical difference among the groups in terms of birth weight, weaning weight and increase in daily live weight. As a result, it was identified that progesterone+PMSG application in addition to flushing application during anestrus season in Kivircik herd which the research is conducted on, had no significant contribution in terms of reproductive performance. At this point, it was concluded that with a right and seasonable flushing application based on the breeder's preference, the estrous could be synchronization and that the lamb efficiency could be increased