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[Reaction of the ovaries of 1- and 4-day-old rat pups to transplantation].

Morphofunctional peculiarities of ovarian development in 1- and 4-day-old rats have been studied under conditions of their transplantation into mature female rats. In 30 days in transplants of both series of the experiments atretic process develops. Better preservation of the general pool of the germ cells and follicles is obtained at transplantation of the ovaries from the 4-day-old donors; their ovocytes at the operation time are at the stationary state of meiosis prophase. Ovocytes of 1-day-old animals, being at the stages of early prophase, are more vulnerable at homotransplantation.