Table 1 Patient characteristics (X ± S, %(n))

Age (years)

31.14 ± 3.90^ab

30.61 ± 4.39^c

29.60 ± 4.34

Infertility duration (years)

3.47 ± 2.60^a

3.83 ± 2.77^c

3.36 ± 2.53

Types of infertility

  Primary infertility

54.87(214)

61.38(531)^c

56.03(2615)

  Secondary infertility

45.13(176)

38.61(334)^c

43.97(2052)

States of embryos

  Fresh embryos

17.18(67)^b

15.61(135)^c

11.87(554)

  Frozen embryos

82.82(323)^b

84.39(730)^c

88.13(4113)

BMI (kg/m²)

21.58 ± 2.96^ab

22.28 ± 3.09

22.33 ± 3.11

Time of fetal reduction (days)^*

42.24 ± 4.83

37.27 ± 8.35

-

Factors affecting SET or DET decisions

  Scar uterus

15.90(62)^a

3.24(28)^c

15.11(705)

  Müllerian anomalies

2.05(8)

1.16(10)

1.31(61)

  Cervical troubles

1.28(5)

0.23(2)

0.66(31)

  Uterine fibroids

5.90(23)^ab

1.73(15)

1.52(71)