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Table 4 Effects of laser quarter-thinning and full-thickness opening on the rate of blastulation, blastocyst hatching, and completely hatched blastocyst at 24, 48 and 72 hours post assisted hatching, compared with non-manipulated controls in experiment 3

From: Effects of partial or complete laser-assisted hatching on the hatching of mouse blastocysts and their cell numbers

  Control Full-thickness Thinning P
(n=180) (n=180) (n=180)
Blastulation rate 176 (97.8%) 173 (96.1%) 178 (98.9%) 0.260a
Hatching rate 97 (55.1%) 167 (96.5%) 167 (93.8%) 0.000b
Hatched rate 75 (42.6%) 106 (61.3%) 69 (38.8%) 0.000c
  1. a Fisher’s Exact Test = 2.815.
  2. b Pearson Chi-Square test, χ 2 = 126.59.
  3. c Pearson Chi-Square test, χ 2 = 20.292.