|
Country
|
Control (n = 157)
|
Fresh embryo transfer (FRESH) (n = 62)
|
Frozen embryo transfer (FET) (n = 24)
|
P value
|
---|
Newborns
|
Birth weight (g)
|
Total
|
3700 ± 436
|
3525 ± 548
|
3805 ± 601
|
0.02
|
FI
|
3667.7 ± 412.2 (n = 100)
|
3443.4 ± 502.8 (n = 29)
|
3846.3 ± 451.4 (n = 18)
| |
EE
|
3758.9 ± 473.9 (n = 57)
|
3595.8 ± 582.4 (n = 33)
|
3679.8 ± 970 (n = 6)
| |
Birth weight SD
|
Total
|
0.21 ± 0.8
|
0.1 ± 1
|
0.6 ± 1
|
NS
|
FI
|
0.1 ± 0.9 (n = 100)
|
− 0.1 ± 0.9 (n = 29)
|
0.6 ± 0.9 (n = 18)
| |
EE
|
0.4 ± 0.6 (n = 57)
|
0.4 ± 1 (n = 33)
|
0.6 ± 0.9 (n = 6)
| |
Length (cm)
|
Total
|
51.0 ± 1.9
|
50.3 ± 2.3
|
51.1 ± 2.3
|
0.04
|
FI
|
51 ± 2 (n = 100)
|
50 ± 2 (n = 29)
|
51 ± 2 (n = 18)
| |
EE
|
51 ± 2 (n = 57)
|
51 ± 2 (n = 33)
|
51 ± 4 (n = 6)
| |
Length SD
|
Total
|
− 0.1 ± 0.8
|
− 0.1 ± 0.8
|
0.1 ± 0.8
|
NS
|
FI
|
− 0.2 ± 0.9 (n = 100)
|
− 0.3 ± 0.8 (n = 29)
|
− 0.0 ± 0.9 (n = 18)
| |
EE
|
0.2 ± 0.8 (n = 57)
|
0.1 ± 0.7 (n = 33)
|
0.6 ± 0.5 (n = 6)
| |
Head circumference (cm)
|
Total
|
35.5 ± 1.3 (n = 155)
|
35.2 ± 1.7
|
35.4 ± 1.9
|
NS
|
FI
|
35.5 ± 1 (n = 100)
|
34.7 ± 2 (n = 29)
|
35.6 ± 2 (n = 18)
| |
EE
|
35.5 ± 1 (n = 55)
|
35.5 ± 2 (n = 33)
|
34.9 ± 2 (n = 6)
| |
Head circumference SD
|
Total
|
0.3 ± 0.8 (n = 155)
|
0.3 ± 1.1
|
0.4 ± 1.3
|
NS
|
FI
|
0.3 ± 0.9 (n = 100)
|
−0.1 ± 1 (n = 29)
|
0.4 ± 1.4 (n = 18)
| |
EE
|
0.4 ± 0.8 (n = 55)
|
0.7 ± 1 (n = 33)
|
0.4 ± 0.7 (n = 6)
| |
Placenta (g)
|
Total
|
565 ± 141
|
514 ± 118 (n = 61)
|
642 ± 187
|
0.04
|
FI
|
626.5 ± 126.4 (n = 100)
|
578.4 ± 105.3 (n = 29)
|
687.4 ± 176 (n = 18)
| |
EE
|
456.7 ± 90.5 (n = 57)
|
454.8 ± 97.9 (n = 32)
|
504.5 ± 159.6 (n = 6)
| |
Gestational age (weeks)
|
Total
|
40.3 ± 1.2
|
39.6 ± 1.4
|
39.8 ± 1.7
|
0.002
|
FI
|
40.4 ± 1 (n = 100)
|
39.9 ± 1.3 (n = 29)
|
40 ± 1 (n = 18)
| |
EE
|
40 ± 1.4 (n = 57)
|
39.3 ± 1.4 (n = 33)
|
39.3 ± 3 (n = 6)
| |
Males
|
Total
|
53%
|
55%
|
58%
|
NS
|
FI
|
52%
|
41%
|
67%
| |
EE
|
54%
|
67%
|
33%
| |
Females
|
Total
|
47%
|
45%
|
42%
|
NS
|
FI
|
48%
|
59%
|
33%
| |
EE
|
46%
|
33%
|
67%
| |
Apgar score (5 min)
|
Total
|
9 ± 1 (n = 156)
|
9 ± 1
|
9 ± 1
|
NS
|
FI
|
9 ± 1 (n = 100)
|
9 ± 0.5 (n = 29)
|
9 ± 0.5 (n = 18)
| |
EE
|
9 ± 1 (n = 56)
|
9 ± 0.7 (n = 33)
|
9 ± 0.8 (n = 6)
| |
Mothers
|
Age (years)
|
Total
|
31 ± 5
|
34 ± 5
|
35 ± 4
|
< 0.001
|
FI
|
32 ± 5 (n = 100)
|
35 ± 4 (n = 29)
|
36 ± 3 (n = 18)
| |
EE
|
29 ± 6 (n = 57)
|
33 ± 5 (n = 33)
|
33 ± 5 (n = 6)
| |
Parity
|
Total
|
0.7 ± 0.9
|
0.3 ± 0.5
|
0.4 ± 0.6
|
0.003
|
FI
|
0.6 ± 0.7 (n = 100)
|
0.2 ± 0.5 (n = 29)
|
0.3 ± 0.5 (n = 18)
| |
EE
|
0.8 ± 1 (n = 57)
|
0.4 ± 0.6 (n = 33)
|
0.7 ± 0.8 (n = 6)
| |
BMI
|
Total
|
23.1 ± 4 (n = 155)
|
23.0 ± 4
|
24.2 ± 4
|
NS
|
FI
|
22.8 ± 3.5 (n = 99)
|
22.9 ± 3.4 (n = 29)
|
23.8 ± 3.4 (n = 18)
| |
EE
|
23.7 ± 5 (n = 56)
|
23.2 ± 5 (n = 33)
|
25.5 ± 4.3 (n = 6)
| |
- FI Finland, EE Estonia, NS not significant