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