the number of births that resulted in the birth of at least one live child per 100 cycles initiated, cycles with follicle puncture or cycles with embryo transfer. When presenting the birth rate, it is necessary to indicate for which cycles it is designed: for cycles initiated, for cycles with follicle puncture, for cycles with embryo transfer (embryos). This indicator is important, for example, in the context of assisted reproductive technology (ART) procedures, such as in vitro fertilization (IVF).