Comparison the pregnancy rates in different synchronization and ovulation protocols in Khuzestan buffalo
Author(s):
Abstract:
Objectives
This study was evaluated the pregnancy rates of fixed time artificial insemination after synchronization of follicular wave Ovsynch CIDR and Co-synch CIDR protocols compared with artificial insemination after estrus detection in select synch protocol.Methods
In this study, 42 cyclic buffaloes, uncertain stage of the estrous cycle, were randomly assigned into 3 groups. 1) Ovsynch CIDR (n = 14), administration of GnRH at days 0 and 9, PGF2α at day 7 and insertion CIDR from days 0 to 7. Buffaloes of this group were inseminated 16 h after the second GnRH administration. 2) Co-synch CIDR (n = 14), insertion the CIDR and administration of GnRH at day 0, administration the PGF2a at day 7 with remove the CIDR, and day 9 with second administration of GnRH, artificial insemination was performed.3) Select synch CIDR (n = 14), hormone treatments of this group were similar to two other groups. But, there was not the second injection of GnRH and artificial insemination was performed after estrus detection during 3 days.Results
The pregnancy rates of Ovsynch CIDR (28.57± 12.53%), Co-synch CIDR (50 ±13.87%) and Select synch CIDR (28.57 ±12.53%) had not significantly difference.Conclusions
In summary, it can be concluded that Co-synch CIDR protocol due to non-significantly higher pregnancy rate is more effective method, when compared with other protocols. and non-necessary to estrus detection as well as low labor.Keywords:
Language:
Persian
Published:
Journal of Animal Science Research, Volume:26 Issue: 1, 2016
Pages:
43 to 50
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