The book is based on research that was conducted to determine the percentage of uterine bacterial infection among PP cross-bred dairy cows and to evaluate its influence on their reproductive efficiency. Furthermore, the effects of intra-uterine infusion of iodine compounds (1% Lugol's iodine and 2% Povidone iodine) on the reproductive efficiency of PP and repeat breeder dairy cows was investigated. The study concluded that, the reduced reproductive efficiency of cross-bred dairy cows is likely to be due to early PP uterine bacterial mild infection that decreases reproductive efficiency and leads to repeat breeding syndrome later. Intra-uterine infusion of 1% Lugol's iodine can be used successfully to improve the PP reproductive performance of cross-bred dairy cows.