Effect of Body Condition Score Limousine Crossbred Cow on Cattle Oestrus Response Synchronized using PGF2α Single Dose

One of the strategies to increase the cattle population in Indonesia is the AI (Artificial Insemination) method. The AI program's improvement of reproductive efficiency can use the oestrus synchronization method. The purpose of this study was to evaluate the effect of body weight and body condition score on the oestrus synchronization response with the brand "lutelyse." This research was conducted in Senggreng Village, Sumberpucung District, Malang Regency, This research method uses experimental field experiments with a sampling technique of purposive sampling. This study took a sample of 21, aged 1,5 – 5 years, synchronized with PGF2α as much as 5 ml, which was then carried out by observing oestrus behavior for 24 hours after synchronization. The results showed that, the percentage of oestrus in cows with body condition score (BCS) 4, which is 76.92%, is lower than cows with BCS 5, which is 100%. For the synchronization distance with the onset of oestrus in BCS 4 cattle, namely 3802.92 ± 1007.80 (minutes) and BCS 5, namely 4081 ± 884.91 (minutes) with the results of the conception rate of BCS 4 cattle of 38.46% and BCS 5 of 50%. Based on the results of the study, it was concluded that BCS 5 has a higher success pregnancy rate than BCS 4.