Dr. M.T. PanchalANKIT K. CHAUDHARI2017-04-112017-04-112012http://krishikosh.egranth.ac.in/handle/1/5810007152Dairy farming is one of the most important agricultural activities in India. The country has now become the largest milk producer in the world, with an estimated milk production of about 121.8 million metric tonnes (NDDB - India, 2011). The profitable dairy farming is predominantly based on two major inter-related factors, viz., nutrition and reproduction. For economic dairy farming, exotic and indigenous dairy cows must calve regularly at every 12 to 13 months interval. Any deviation or prolongation in breeding rhythm results in progressive economic loss due to extension of open days, reduced calvings and lactations during the life span of animal. The veterinarian plays important role in the modern dairy husbandry by assisting the farmer in reproductive management of dairy animals. The veterinarian aims at maintaining the inter-calving period as short as possible, to maintain the economics of dairy industry. The assessment of reproductive performance is dependent on fertility of the animal. An early diagnosis of pregnancy is essential for reproductive management as well as economic production. The accurate record of reproductive status of each animal is an essential pre-requisite for periodic gynaeco-clinical diagnostic procedures, timely presentation, detection and correction of impaired fertility in the herd.enveterinary science, animal reproductionstudyThesis