Table 2 The day of embryo culture and blastocyst score

the day of embryo culture

5

78.79%

(26)

27.78%

(10)

57.48%

(1329)

0.01*

0.0002*

6

21.21%

(7)

69.44%

(25)

42.17%

(975)

7

2.78%

(1)

0.35%

(8)

Blastocyst expansion

4

100%

(33)

97.22%

(35)

98.10%

(2268)

0.4172

0.6899

5

2.78%

(1)

1.64%

(38)

6

0.26%

(6)

Inner cell mass

A

21.21% (7)

8.33% (3)

12.89%

(298)

0.1853

0.4174

B

78.79% (26)

91.67% (33)

87.11% (2014)

Trophectoderm development

A

12.12%

(4)

2.78%

(1)

11.81%

(273)

0.7558

0.0092*

B

69.70%

(23)

61.11%

(22)

67.60%

(1563)

C

18.18%

(6)

36.11%

(13)

20.59%

(476)