Fertility response in postpartum anoestrus buffaloes (Bubalus bubalis) using modified Ovsynch based timed...

Area of Science:

• Veterinary Science
• Animal Reproduction
• Endocrinology

Background:

• Suboestrus significantly reduces reproductive efficiency in buffaloes.
• Oestrus synchronization (OS) and fixed-time artificial insemination (AI) offer a solution to improve buffalo reproduction.
• Post-partum anoestrus is a major challenge in dairy buffaloes.

Purpose of the Study:

• To evaluate the efficacy of a modified Ovsynch protocol with fixed-time AI in post-partum anoestrus buffaloes.
• To compare different modified Ovsynch protocols incorporating insulin.
• To assess synchronization and conception rates in treated buffaloes.

Main Methods:

• Fifty post-partum anoestrus buffaloes were divided into five groups (n=10).
• Groups received varying doses of GnRH (buserelin acetate) and PGF2α, with some groups receiving additional insulin administration.
• Fixed-time AI was performed 60-72 hours after PGF2α, with pregnancy confirmed at 60 days post-insemination.

Main Results:

• Oestrus synchronization rates ranged from 60-80% across groups.
• Conception rates varied between 20-40% among the treatment groups.
• Modified protocols demonstrated better synchronization, and non-significantly higher conception rates (40%) were observed in insulin-modified groups (II-V) compared to the control (20% in Group I).

Conclusions:

• Insulin-modified Ovsynch protocols provide satisfactory and comparable oestrus synchronization and conception rates in post-partum anoestrus buffaloes.
• Modified protocols, particularly those including insulin, show potential for enhancing reproductive efficiency.
• Further research may optimize insulin's role in improving buffalo reproductive outcomes.