Table 1 Characteristics of the patients and the IVF cycle that gave rise to miscarriage conception in the different management groups

N of patients

78

61

84

Age (years)

34.6 ± 6.6(35(29–41))

37.1 ± 5.0(39(33–41))

35.7 ± 5.6(37(31–40))

0.06

BMI

25.8 ± 2.8(25(23–28))

24.3 ± 6.1(23(19–30))

26.7 ± 7.8(24(21–30))

0.61

 Gravidity

1.3 ± 1.5(1(0–2))

1.8 ± 2.2(1(0–3))

1.8 ± 1.8(2(2–3))

0.16

 Past deliveries

28/72 (38.9%)

27/59 (45.8%)

49/81 (59.3%)

0.04

 Prior miscarriages

0.8 ± 1.2(0(0–1))

1.1 ± 1.8(1(0–2))

0.9 ± 1.4(0(0–1))

0.41

 Patients with a previous D&C

17.9%

25.5%

19.7%

0.83

 Infertility (years)

4.1 ± 4.8(3(1–5))

2.6 ± 1.8(2(1–4))

4.2 ± 3.3(3(2–6))

0.08

 Day 3 FSH levels^a (mIU/ml)

7.7 ± 6.9(6(5–9))

8.4 ± 7.5(7(6–9))

6.9 ± 3.1(7(5–8))

0.41

 Peak E2 levels (Fresh cycles, pmol/l)

6146.2 ± 3939.9(5477(2896–8593))

5910.9 ± 3464.5(4942(3928–7866)

6267.3.5 ± 4273.0(5654(3547–8104))

0.53

 Endometrium (mm) at hCG/LH/P

9.9 ± 1.8(10(9–12))

10.1 ± 2.0(10(9–11))

10.1 ± 2.1(10(9–12))

0.81

 > 1 embryonal sac

8(10.5%)

3(4.9%)

7(7.7%)

0.48

 Week of miscarriage

6.7 ± 1.3(6(6–7))

7.7 ± 1.3(7(7–9))

8.6 ± 1.6(8(8–10))

< 0.001^b

 Hysteroscopy for retained placenta

3(4.2%)

1(1.8%)

0

0.13