Objective: Summarize different ways of assisted reproduction performance evaluation. Design: Review. Setting: Centre for Assisted Reproduction, Department of Gynaecology and Obstetrics, 1st Faculty of Medicine, Charles University, Prague. Methods: In databases of assisted reproduction centres, in national and international registers we evaluate data concerning in vitro fertilisation and related methods. Target of this evaluation is, first of all, to increase efficiency. Results: Outputs of all the registers inform about absolute numbers of cycles, deliveries, born babies and about relative parameters (implantation rate, pregnancy rate), describing the efficiency of the treatment. Conclusion: The output evaluation must consider the influence of the age of female, number of transferred embryos and other factors.

        Key words: IVF, effectivity, implantation rate, pregnancy rate, law, data, register