Table 1 Clinical characteristics of the study population

Clinical characteristics in pregnancy

 Maternal age (y)^a

34.9 ± 3.8

 Nulliparity^b

182 (73.4)

 Height (cm)^a

161.5 ± 5.1

 BMI at the first visit for the antenatal care^a

23.0 ± 4.3

 Spontaneous abortion after myomectomy^b

32 (12.9)

Method of conception

 Spontaneous^b

187 (75.4)

 Ovarian stimulation^b

6 (2.4)

 In vitro fertilization^b

55 (22.2)

 Twin pregnancy^b

18 (7.3)

 Interval time between myomectomy and pregnancy (month)^a

23.8 ± 23.2

  <6 months^b

46 (18.5)

  ≤6 and <12 months^b

43 (17.3)

  ≤12 and <24 months^b

76 (30.6)

  ≥24 months^b

83 (33.5)

Clinical characteristics at the time of myomectomy

 Age (y)^a

32.9 ± 4.1

 BMI at the time of myomectomy^a

22.0 ± 3.2

 Spontaneous abortion before myomectomy^b

69 (27.8)

 Prior preterm birth before myomectomy^b

4 (1.6)

Number of uterine myomas removed

 One^b

102 (41.1)

 Two^b

42 (16.9)

 Three^b

27 (10.9)

 Four or more^b

77 (31.0)

Sum of the diameters of which the three biggest uterine myomas^a

11.0 ± 4.3

Type of uterine myomas

 Only intramural myomas^b

25 (10.1)

 Only subserosal myomas^b

77 (31.0)

 Coexistence of intramural and subserosal myomas^b

146 (58.9)

 Laparoscopic myomectomy^b

70 (28.5)