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Table 6 The comparisons of clinical characteristics between cleavage embryo and blastocyst transfer groups stratified by age

From: Chromosomal analysis of 262 miscarried conceptuses: a retrospective study

Maternal age

 

 < 35

 

 ≥ 35

 
  

Cleavage embryo

Blastocyst

P

Cleavage embryo

Blastocyst

P

History of pregnancy loss

Sporadic

37(80.4%)

45(68.2%)

0.15

21(72.4%)

5(27.8%)

0.003

Recurrent

9(19.6%)

21(31.8%)

 

8(27.6%)

13(72.2%)

 

Gestational age (weeks)

 < 12

42(93.3%)

63(95.5%)

0.954

27(93.1%)

17(94.4%)

1

 ≥ 12

3(6.7%)

3(4.5%)

 

2(6.9%)

1(5.6%)

 

Abnormality of chromosomes

Yes

29(63%)

21(31.8%)

0.001

21(72.4%)

6(33.3%)

0.008

No

17(37%)

45(68.2%)

 

8(27.6%)

12(66.7%)

 

Type of chromosomal abnormality

No

17(37%)

45(68.2%)

0.0001

8(27.6%)

12(66.7%)

0.018

Structural

16(34.8%)

3(4.5%)

 

2(6.9%)

0

 

Numerical

13(28.3%)

18(27.3%)

 

19(65.5%)

6(33.3%)

 

Type of structural abnormality

Del

8(50%)

1(33.3%)

0.523

0

0

 

Dup

6(37.5%)

2(66.7%)

 

2

0

 

Del and Dup

2(12.5%)

0

 

0

0

 
  1. Data were expressed as frequency and percentage (%). The chi-square test or the Fisher’s exact test were used according to the sample size and prediction frequency. P < 0.05 was considered as statistically significant difference
  2. Del deletion, Dup duplication