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Table 2 The correlation between nuclear maturation (NM) in GV, MI, and MII oocytes and zona pellucida birefringence intensity (ZP-BF)

From: Evaluation of zona pellucida birefringence intensity during in vitro maturation of oocytes from stimulated cycles

Oocyte stage Score ZP-BF Score
  total high/positive low/negative
GV 2.4 ± 4.5* 4.0 ± 3.3§ -3.8 ± 2.6
MI 3.0 ± 4.6* 4.7 ± 3.3§ -3.4 ± 2.8
MII 3.3 ± 4.3* 4.8 ± 3.5§ -3.0 ± 1.5
  1. The analysis using the numerical values of the ZP scores. Data are reported as means ± SD.
  2. *P > 0.05; §P > 0.05; P > 0.05