For maintaining a good livestock enterprise and have steady income, it is essential to have animals with good reproductive status. In dairy animals, majority of factors like nutrient intake, physiological status, manage mental and climatic conditions affect fertility of the animal. In India the main factor affecting the reproduction is nutrition status that too minerals. So to have a good return from the livestock balanced feeding of the animals must be done. Proper feeding of minerals with respect to the various stages of life cycle must be done to improve the reproductive efficiency.