Conception rate in Repeat Breeder Cows following Multiple Artificial Inseminations during Spontaneous Estrus
Publication Date : 17/05/2015
The present study was aimed to determine whether the application of multiple A.I with frozen-thawed semen of good fertility during spontaneous estrus would improve pregnancy rates in repeat breeder cows. Twenty two repeat breeder cows were randomly allotted to two different treatments. Group-I (control) consisted of 11 repeat breeder cows which were done single A.I. during the observed estrus. Group-II (treatment) consisted of 11 repeat breeder cows which were subjected to multiple A.I during the observed estrus until the estrus signs subside. Analysis of the data revealed that there was no significant differences (P>0.05) in the mean serum progesterone concentrations between the two groups at the time of A.I. All the repeat breeder cows in the two groups were found negative for subclinical endometritis. The conception rates obtained were 18.18 and 27.27 per cent in Group-I and Group-II repeat breeder cows, respectively. There was a significant (P<0.05) difference in the conception rate between the two groups. It can be concluded that multiple A.I could be implemented in repeat breeder cows with appreciable conception rates without incurring any financial constraints to the poor farmers.
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