Pregnancy diagnosis-positive rate and conception rate as indicator of farm reproductive performance.

The present study was designed to evaluate the Pregnancy Diagnosis-Positive Rate (PD-PR) along with conception rate (CR) in an organised farm (Livestock Research Centre, National Dairy Research Institute, Karnal) to take effective management decision. One year record of Artificial Insemination (A.I.) and PD of dairy animals (N=1327; comprised 1003 cows and 324 buffaloes) was analysed. On an average, cows and buffaloes were presented for per rectal pregnancy diagnosis after 75.63 (38-119) and 76.3 (46-128) days, respectively of A.I. Overall PD-PR value of cattle was observed to be significantly higher compared to buffaloes (70.77 and 59.45%, respectively, p<0.001). However, buffaloes showed a higher trend of overall CR compared to cattle (41.28 and 46.6%, respectively, p=0.092). PD-PR value were 14.23% and 25.55% less in cattle and buffaloes, respectively compared to the farm standard i.e, 85%. The PD-PR and CR value were observed to be higher during winter season both in cattle (77.42 and 47.86%, respectively) and buffaloes (69.23 and 60.00%, respectively). However, lower value of PD-PR and CR were observed during rainy in cattle (66.14 and 36.68%, respectively) and summer in buffaloes (50.98 and 36.11%, respectively). It was evident that heat stress along with humidity has negative effect on display of oestrus symptoms as well as on CR. [ABSTRACT FROM AUTHOR]