Analysis of the efficacy of use hormone «Follimag» to stimulate reproductive capacity of female rabbit

Abstract

In commercial rabbit meat production, the combination of artificial insemination and management in a batch system is widely used and has replaced natural mating. However, in such systems the success of AI depends largely on the synchronization of oestrus. The irregularity of the oestrus cycle, especially during the lactation period, necessitates a method to synchronize sexual receptivity of the does on the intended AI day. The objective of our experiment was to compare the efficacy of ovulation stimulation in artificial insemination of female rabbit. The task was to compare the results of artificial insemination by using Pregnant Mare Serum Gonadotropin "Follimag" (Mosagrogen) and non-hormonal treatment of (PMSG). The AI technique in rabbits needs an ovulation stimulator or inducer because female rabbits are induced ovulators. In our experiments, we used Surfagon to inducte ovulation by the methodology proposed by Lisin V. I., Sushko A.B., Institute of animal science of the NAAS. Experimental female rabbits were divided into 3 homogenous groups. All animals were maintained and fed in the same way. Artificial light was on from 09.00 to 20.00 h. Receptivity of all does was judged based on vulva colour and turgency just before gonadotropin treatment and in the day before artificial insemination. In two experimental groups with PMSG treatment was observed more pronounced improvement of vulva colour and turgency the day before artificial insemination. Gonadotropin treatment was applied intramuscularly once three days before artificial insemination. We used the dose of 40IU of PMSGfirst group, 25IU of PMSG-second group and control group (no oestrus synchronization). The experimental data have shown that the differences between the results of artificial inseminations of rabbit does with the serial use of "Follimag" (PMSG) resulted in 19,29% and 11,36% improvement as compared to the controls (40 IU of PMSG-75,0%;25 12 IU of PMSG-82,93%;control group-63,64%). In the future carry out further research to monitor the effects of gonadotropin hormones on fertility, estrus, quality and quantity of litter, the physiological condition of rabbit does.