Success of IVF depends on many different factors: parents’ age, reasons and duration of infertility, ovary reaction on stimulation, quantity and quality of oocytes that mature in follicles, sperm quality. Quite often the procedure outcome cannot be explained from the scientific point of view. The technology of the process, the character of hormone medications being applied, medium quality, provision of clinics with laboratory glassware and plastic ware are very significant for the increasing of IVF effectiveness.