On the basis on functional morphology and ecology of Varroa jacobsoni the reproductive cycle of female mites was divided into 5 stages : copulation, puberty, preoviposition, oviposition, rehabilitation. The whole ontogeny from egg to formed protonymph in the chorion proceeds very intensively (26 to 30 hours). Besides the reproductive potential is realized during an extremely short period (6 to 7 days) which duration is determined by the total duration of the mite's ontogeny, so that the development of adult mites in all of the viable eggs laid has to be completed by the time the bees leave the brood.