In this section you will know the topographic anatomy of genital tract of the mare, physiology of reproduction and staging of the estrus cycle. Management of breeding and determination of suitable time of insemination with fresh and frozen semen. Also in this chapter you will be able to make precise pregnancy diagnosis, estimation of age, detection of twins and methods of reduction of twins. idea of embryo transfer, why we use such technology , Also this chapter discusses the other assisted reproductive technologies such as oocyte transfer, Gamete intrafallopian transfer