Table 3. Influence of embryonic morphological quality on D1 (17 HPI), D2 (44 HPI) and D3 (HPI) on the risk of embryonic aneuploidy
  Euploid Group
N=200		 Aneuploid Group
N=222		 p
Number of embryonic pro-nuclei      
0
1
2		 30.8% (4)
0
47.8% (188)		 69.2% (9
100% (1)
51.8% (202)		 0.318*
Nuclear precursor corpuscles      
Type 1
Type 2
Type 3		 47.8% (142)
48.1% (37)
53.3% (8)		 52.2% (159)
51.9% (40)
46.7% (7)		 0.916*
Number of polar corpuscles      
1
2		 50.0% (3)
47.5% (189)		 50.0% (3)
52.5% (209)		 0.903*
Number of blastomeres on D2, mean 4.0 (0.9) 3.9 (0.9) 0.184†
Embryonic classification on D2, % (N)      
Type 1
Type 2
Type 3		 47.0% (183)
46.2% (6)
0% (0)		 53.0% (206)
53.8% (7)
0% (0)		 0.950*
Number of blastomeres on D3, mean 7.6 (1.5) 7.6 (1.5) 0.576†
Embryonic classification on D3, % (N)      
Type 1
Type 2
Type 3		 46.4% (159)
56.3% (18)
100% (1)		 53.6% (184)
43.8% (14)
0% (0)		 0.322*

*Chi-squared or Fisher's test
†T-test
HPI: hours post insemination