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Distribution of ICSI-produced equine embryos among developmental stages in each time point of collection. The time points of collection are measured in hours after ICSI (hpi). The oocytes in metaphase II (MII) did not activate after the injection of the spermatozoon, which was found intact in the cytoplasm of the oocyte. The number of injected oocytes collected at each time point is indicated in the right. Degenerated oocytes and zygotes were excluded from the analysis
