Table 3 Pregnancy outcomes after FET cycles in the groups

Number of transferred embryos

1.95 ± 0.45

1.86 ± 0.48

0.223

–

–

–

Endometrial thickness (mm)

9.79 ± 1.79

9.57 ± 1.82

0.395

–

–

–

Clinical pregnancy rate (%)

37.61 (41/109)

32.95 (29/88)

0.497

1.230 (0.680–2.211)

0.441

1.286 (0.671–2.470)

Live birth rate (%)

41.46 (17/41)

34.48 (10/29)

0.555

1.353 (0.496–3.611)

0.551

1.390 (0.478–3.990)

Miscarriage rate (%)

29.27 (12/41)

20.69 (6/29)

0.420

0.632 (0.210–1.942)

0.728

1.091 (0.261–4.660)

Ongoing pregnancy rate (%)

17.07 (7/41)

17.24 (5/29)

0.985

0.988 (0.280–3.487)

0.534

1.672 (0.331–8.455)

Biochemical pregnancy rate (%)

9.17 (10/109)

7.95 (7/88)

0.762

0.857 (0.311–2.346)

0.905

0.932 (0.307–2.844)

Gestational age (wk)

37.93 ± 1.50

37.87 ± 2.29

0.605

–

–

–

 < 37 weeks

23.53 (4/17)

20 (2/10)

0.831

0.809 (0.120–5.496)

0.179

0.041 (0.000–4.348)

 ≥ 37 weeks

76.47 (13/17)

80 (8/10)

–

Ref

–

Ref

Birth weights (g)

3014.44 ± 357.26

2895.83 ± 393.39

0.545

–

–

–

 Less than 2500

5.88 (1/17)

10 (1/10)

0.696

1.782 (0.102–31.976)

0.999

–

 2500–4000

94.12 (16/17)

90 (9/10)

–

Ref

–

Ref