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Table 1 Comparisons of poor-quality blastocyst FET cycles between SBT and DBT groups stratified by blastocyst development speed

From: Effect of blastocyst morphology and developmental speed on transfer strategy for grade “C” blastocyst in vitrified‐warmed cycles

 

D5

D6

 

SBT group

DBT group

P

SBT group

DBT group

P

Cycles (n)

476

365

 

730

467

 

female age (year)

31.80 ± 4.05

31.40 ± 3.78

0.105

32.92 ± 4.29

32.09 ± 4.20

0.757

BMI (kg/m2)

22.01 ± 3.35

21.58 ± 3.46

0.909

21.83 ± 3.08

22.11 ± 3.24

0.103

AMH (ng/ml)

6.07 ± 4.17

6.75 ± 4.30

0.333

4.82 ± 3.69

4.97 ± 3.96

0.462

Duration of infertility (years)

4.78 ± 3.24

4.71 ± 3.04

0.682

4.86 ± 3.21

4.82 ± 3.20

0.653

Endometrial preparation (%)

  

0.525

  

0.447

Natural

38.03

(181/476)

35.89

(131/365)

 

39.45

(288/730)

37.26

(174/467)

 

HRT

61.97

(295/476)

64.11

(234/365)

 

60.55

(442/730)

62.74

(293/467)

 

Endometrial thickness (mm)

8.97 ± 1.39

8.91 ± 1.42

0.387

8.95 ± 1.44

9.05 ± 1.46

0.657

Implantation rate

42.44

(202/476)

41.64

(304/730)

0.785

20.82

(152/730)

22.38

(209/934)

0.445

Pregnancy rate

42.44

(202/476)

59.73

(218/365)

0.000

20.82#

(152/730)

37.90

(177/467)

0.000

Multiple pregnancy rate

3.96

(8/202)

39.91

(87/218)

0.000

2.63

(4/152)

19.21

(34/177)

0.000

Early miscarriage rate

22.28

(45/202)

19.72

(43/218)

0.521

27.63

(42/152)

22.03

(39/177)

0.240

Miscarriage rate

22.77

(46/202)

22.48

(49/218)

0.942

30.92

(47/152)

25.99

(46/177)

0.322

Ectopic pregnancy rate

0.99

(2/202)

0.46

(1/218)

0.947

0

(0/152)

1.13

(2/177)

0.501

Live birth rate

32.35

(154/476)

46.03

(168/365)

0.000

14.25#

(104/730)

27.41

(128/467)

0.000

Singleton

31.30

(149/476)

29.86

(109/365)

0.654

14.25

(104/730)

23.55

(110/467)

0.000

Twin

1.05

(5/476)

16.16

(59/365)

0.000

0

(0/730)

3.85

(18/467)

0.001

Preterm birth (<37weeks)

9.74

(15/154)

32.14

(54/168)

0.000

6.67

(7/105)

17.19

(22/128)

0.015

Singleton

8.44

(13/154)

8.93

(15/168)

0.877

6.67

(7/105)

8.59

(11/128)

0.584

Twin

1.30

(2/154)

23.21

(39/168)

0.000

0

(0/105)

8.59

(11/128)

0.001

Gestational age (weeks)

38.51 ± 1.75

36.52 ± 3.79

0.000

38.45 ± 1.58

37.79 ± 1.84

0.054

Singleton

38.60 ± 1.74

38.37 ± 1.90

0.428

38.45 ± 1.58

38.29 ± 1.61

0.954

Twin

36.33 ± 0.52

34.83 ± 4.28

0.120

/

36.18 ± 1.60

/

Birth height (mm)

49.75 ± 1.77

47.82 ± 3.65

0.000

49.81 ± 1.82

48.97 ± 2.97

0.001

Singleton

49.89 ± 1.65

49.69 ± 1.70

0.950

49.81 ± 1.82

49.95 ± 1.91

0.813

Twin

46.33 ± 1.21

46.11 ± 4.09

0.197

/

45.55 ± 3.56

/

Birth weight (kg)

3227.16 ± 459.78

2736.0 ± 665.34

0.000

3263.60 ± 538.74

3026.75 ± 599.13

0.101

Singleton

3255.69 ± 442.21

3169.31 ± 468.53

0.944

3263.60 ± 538.74

3207.98 ± 527.65

0.547

Twin

2523.33 ± 318.04

2339.42 ± 564.46

0.294

/

2445.74 ± 420.85

/

Low birth weight (<2500 g)

8.18

(13/159)

31.28

(71/227)

0.000

3.85

(4/104)

15.75

(23/146)

0.003

Singleton

5.37

(8/149)

5.50

(6/109)

0.962

3.85

(4/104)

4.55

(5/110)

0.999

Twin

50.0

(5/10)

55.08

(65/118)

0.999

/

50.0

(18/36)

/

  1. #P value < 0.05 compared to the D5-SBT group