In order to promote reproductive management in ruminants, all the new advances and existing facilities should be used and, by knowing the effective factors in reproduction and using appropriate methods, would increase the economic profit in this industry. Reproduction in ruminants is influenced by several factors such as genetic and genetic potential, stage and type of nutrition, environmental factors, day length, livestock health, and so on. he uses of ovulation or Synchronization of estrus coexistence programs increases the number of cows in a short period of time. In the current method, ie observation of estrus and noculation, the fertility rate is 50%, In the case of synchronization, the new method reduces the fertility rate to 32%, but in the new method, However, in the new method, the total number of pregnancies in the new method increases annually. To increase the total percentage of pregnancy of the herd, different methods or changes in methods are used. Synchronization of estrus allows the farm manager to plan and inseminate livestock as a work plan appropriate to other activities required, and the time-consuming work of eruptive diagnosis is reduced and the breeding season can be shortened. The benefits of an artificial insemination synthetic system increase in conditions where the degree of perineal diagnosis and the rate of pregnancy are low. Euthanasia synchronization is an effective program for dairy cattle throughout the world, so that a high percentage of livestock in the specified period of time is indicated by estrus and based on the emergence or absence of estrus symptoms Are inoculated. Therefore, in this article, the methods of ovulation induction and estrus synchronization are discussed.