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. 2022 Mar 21;39(4):905–918. doi: 10.1007/s10815-022-02418-y

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© The Author(s) 2022, corrected publication 2022

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Fig. 2 — Timeline of meiotic maturation and POA in in vitro studies in different mammals: human, mouse, rat, and pig. Schematic summary of the average different timings utilized for meiotic maturation and activation of POA in the in vitro studies reported in this review. For humans, see [13]. Abbreviations: GV, germinal vesicle; MI, metaphase I; MII, metaphase II; POA, postovulatory aging