Effect of follicular wave emergence on OPU-IVEP attributes in Bos indicus breeds of cattle

A comparison of different Ovum Pick-up (OPU) and invitro Embryo Production (IVEP) attributes between two different OPU sessions each in Ongole and Gir cattle was attempted in the present study.Among the two OPU sessions, first OPU session was conducted on day 9 (luteal phase) of the induced estrous cycle and the second session was conducted on a random day of the cycle with a gap of 2-4 weeks apart between the OPU sessions.Study was conducted in two Bos indicus breeds viz., Ongole cows (n=6) and Gir cows (n=6) with a total of 24 OPU sessions.Various OPU-IVEP attributes such as means of antral follicle count (AFC), follicles aspirated, COCs retrieved and embryos produced did not show any significant difference between different OPU sessions.Also, different attributes were similar between the two breeds.The results implied that in the present study OPU frequency did not have any impact on the studied attributes and also the different breeds viz., Ongole and Gir (both Bos indicus) are similar in all the noted OPU-IVEP attributes.