Abstract   

    Data on clinical records of 3760 crossbred cows at various locations in NWFP revealed 379 (10.08%) cases of reproductive abnormalities. Cervicitis had the highest incidence of 45.12%, followed by abnormalities of uterus (38.26%), vagina (10.29%) and ovary (6.33%). The frequencies of endometritis and vaginitis were 28.69 and 4.76%, respectively. Ovarian cysts were found in 6.33% of the cases. The incidence of pyometra, vaginal tumors, pyometritis and metritis were 6.53, 1.83, 5.56 and 1.58%, respectively. Genetic group, season and locality had significant effect (p<0.01) on incidence of various reproductive abnormalities. Cows possessing 75% Holstein Friesian (HF) inheritance were the most susceptible to reproductive disorders. Summer was the peak (35.88%) season and spring the trough (15.57%) season of incidence. The highest incidence of reproductive disorders was found in Peshawar (34.31%), followed by cows in Bannu (26.13%), Mardan (13.18%), Risalpur (8.97%), Nowshera (6.58%), Kohat (6.33%) and Dera Ismail Khan (4.23%). It was con that reproductive disorders were more prevalent under stressful environment, within or around thickly populated areas, during hot summer months and among crossbred cows possessing HF inheritance above 50%. It was recommended that around 50% HF genes should be maintained in crossbred cows.    

Key words: Reproductive disorders, incidence, crossbred cattle.