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Table 1 - Impact of cryopreservation protocol (vitrification versus slow-freezing) on morphology of ovarian follicles according to developmental stage

From: Vitrification of human ovarian tissue: a practical and relevant alternative to slow freezing

   Number of resting follicles (%) Number of primary follicles (%) Number of secondary follicles (%)
Group Total number of follicles Total Intact Total Intact Total Intact
Unfrozen 249 203 (81.5 %) 203 (100 %) 39 (15.7 %) 38 (97.4 %) 7 (2.8 %) 7 (100 %)
Vitrification 482 467*** (96.9 %) 392*** (84 %) 11** (2.3 %) 9 (81.8 %) 4* (0.8 %) 2 (50 %)
Slow-freezing 374 365*** (97.6 %) 293*** (80.3 %) 9** (2.4 %) 9 (100 %) 0* (0 %) _
  1. Data are expressed as numbers and proportions [n (%)]. *0.01 < p < 0.05, **0.001 < p < 0.01, ***p < 0.001 compared to the unfrozen control