Parameter

Synchronized

Unsynchronized

Mixed

Group comparison

Association with pregnancy

Rate of cycles with full blastomere survival

62.7%

43.8%

38.3%

P < 0.0001 a

(S vs U) P < 0.001

(S vs M) P < 0.0001

(U vs M) NS

NS

Blasatomere survival rate (%)

91.5 ± 31.5

80.2 ± 26.3

81.1 ± 29.7

P < 0.001 b

(S vs U) P < 0.002

(S vs M) P < 0.001

(U vs M) NS

NS

Blasatomere survival rate (%) 2 days

90.9 ± 31.4

87.2 ± 27.5

83.5 ± 31.4

NS

Blasatomere survival rate (%) 3 days

96.5 ± 32.4

79.6 ± 26.2

75.8 ± 24.8

P < 0.034

(S vs U) P < 0.042 c

(S vs M) P < 0.01

(U vs M) NS

Rate of cycles with full embryos survival rate (%)

57.3%

47.7%

41.4%

P < 0.004 d

(S vs U) P < 0.07

(S vs M) P < 0.001

(U vs M) NS

NS

Embryo survival rate (%)

80.9 ± 23.8

77.8 ± 23.4

75.0 ± 23.8

P < 0.038 e

(S vs U) NS

(S vs M) P < 0.01

(U vs M) NS

NS

Embryo survival rate (%) 2 days

81.0 ± 23.9

81.6 ± 24.1

75.2 ± 24.0

NS

Embryo survival rate (%) 3 days

78.9 ± 23.5

77.5 ± 23.4

74.4 ± 23.5

NS

Rate of cycles with at least one surviving embryo (%)

91.8% (225)

87.8% (130)

89.4% (203)

NS