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Control of reproductive function of cattle using cloprostenol
Australian Veterinary Journal
|November 1, 1976
Summary
Cloprostenol effectively synchronizes oestrus in heifers, achieving a 63% conception rate. It also induces parturition, though with variable success and increased retained foetal membranes in some cases.
Area of Science:
- Veterinary Medicine
- Reproductive Biology
Background:
- Oestrus synchronization is crucial for efficient cattle management.
- Inducing parturition can aid in managing calving timelines.
Purpose of the Study:
- To evaluate cloprostenol for oestrus synchronization in heifers.
- To assess cloprostenol's efficacy in inducing parturition in late-pregnant heifers.
Main Methods:
- Administered cloprostenol intramuscularly 12 days apart for oestrus synchronization.
- Administered cloprostenol in late pregnancy to induce parturition at different gestational stages.
Main Results:
- Oestrus synchronization resulted in 63% conception rate.
- Parturition induction showed variable success rates (19% unresponsiveness) and latent periods.
- Calf survival was 71% for induced births versus 80% for controls.
- Approximately 50% of induced heifers retained foetal membranes, compared to none in controls.
Conclusions:
- Cloprostenol is effective for oestrus synchronization in heifers.
- Cloprostenol can induce parturition but carries risks of unresponsiveness, retained foetal membranes, and reduced calf survival.