Forty local non-descript cows were allocated into four groups and artificially inseminated with the import­ ed frozen semen of four dairy cattle breeds viz. Jersy, Holstein  Friesien,  Brownswiss  and Ayreshire. Produced F1 crossbred females  were maintained in the same management. Their reproductive and productive performances along with reproductive disorders were monitored upto the 6th lactation of an individual animal. Nepali non-descript x Holstein Friesien Fl crossbred showed earlier calving at the age of 27 ± 3.5 months. Shortest calving inteival ( 13.8 ± 0.4 month) was found  in Nepali non-descript x Jersey. The highest 4% FCM of 1745 litres milk per lactation was found in Nepali non-descript x Holstein Friesien F1 crossbred. The highest number of Dystocia and retained placenta were shown by Nepali Non-descript x Holstein Friesien and Nepali Non-descript x Brownswiss  F1 crossbreds respectively.

Forty local non-descript cows were allocated into four groups and artificially inseminated with the import­ ed frozen semen of four dairy cattle breeds viz. Jersy, Holstein  Friesien,  Brownswiss  and Ayreshire. Produced F1 crossbred females  were maintained in the same management. Their reproductive and productive performances along with reproductive disorders were monitored upto the 6th lactation of an individual animal. Nepali non-descript x Holstein Friesien Fl crossbred showed earlier calving at the age of 27 ± 3.5 months. Shortest calving inteival ( 13.8 ± 0.4 month) was found  in Nepali non-descript x Jersey. The highest 4% FCM of 1745 litres milk per lactation was found in Nepali non-descript x Holstein Friesien F1 crossbred. The highest number of Dystocia and retained placenta were shown by Nepali Non-descript x Holstein Friesien and Nepali Non-descript x Brownswiss  F1 crossbreds respectively.