The book discusses the features of feline breeding biology affecting the behavior associated with the search for a mating partner, changes in labeling and acoustic activity during this period, changes in the hormonal status of animals associated with reproduction, as well as the specific mechanism of functioning of yellow bodies in the genus lynx. Mechanisms of increasing reproductive success in the promiscuity mating system (increased intensity of ovulation, embryonic mortality, sperm competition), as well as factors affecting post-embryonic mortality in feline broods are considered.