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Table 1 Histomorphological analysis of preservation for follicles, stromal cells, and vessels in fresh (A) ovarian tissue, rapid frozen/thawed tissue in PP vial (B), and in quartz vial (C)

From: Comparison of quartz vials with polypropylene vials for rapid cryopreservation of human ovarian tissue

Preservation Score A - fresh ovarian tissue B - rapid frozen/thawed tissue in PP vial C - rapid frozen/thawed tissue in quartz vial P (Fisher’s exact test)
Follicles 1 9 (90 %) 4 (36.4 %) 12 (92.3 %) 0.004*
2 1 (10 %) 7 (63.6 %) 1 (7.7 %)  
3 0 0 0  
Stromal cells 1 10 (62.5 %) 13 (54.2 %) 9 (47.4 %) 0.80
2 6 (37.5 %) 9 (37.5 %) 8 (42.1 %)  
3 0 (0 %) 2 (8.3 %) 2 (10.5 %)  
4 0 (0 %) 0 (0 %) 0 (0 %)  
Vessels 1 5 (38.5 %) 2 (10 %) 1 (9.1 %) 0.16
2 6 (46.1 %) 7 (35.0 %) 6 (54.5 %)  
3 2 (15.4 %) 5 (25.0 %) 3 (27.3 %)  
4 0 (0 %) 6 (30.0 %) 1 (9.1 %)  
  1. For follicle preservation, score 1 is considered as well preserved, score 2 as quite good preserved, and score 3 as degenerated follicles. For stromal cells and vessels, scores 1 + 2 are considered as well preserved, score 3 as not optimal preservation, and score 4 as degenerated stromal cells or degenerated vessels, resp
  2. Data are presented as numbers and percentage (in brackets)
  3. *) Method B differs significantly from C (two sided Fisher’s exact test, p = 0.008)