The Animal Reproduction Research Institute may be considered to date back to 1968 when the first center for bull investigation in Egypt was established. Its main responsibilities were the examination of bulls used for artificial insemination of bulls used for artificial insemination or natural bereeding purposes, in addition to examining samples received from districts throughout Egypt for diagnostic purposes. long before that time, however, different aspects of animal reproduction were practiced in an informal, and later, formal manner. for example, artificial insemination has been apllied in a primitive fashion for hundreds of years. Fresh semen,collected from newly impregnated femal animals, was injected into other femal animals.