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Table 1 Characteristics and indications of the study participants (N = 100)

From: Transvaginal two-dimensional ultrasound measurement of cervical volume to predict the outcome of the induction of labour: a prospective observational study

Characteristic Nulliparous women
n = 71 (71.0%)
Parous women
n = 29 (29.0%)
Maternal age in years: mean (SD) 27.2 (4.2) 31.3 (4.4)*
Gestational age at induction of labour in days: mean (SD) 278.7 (9.6) 282.9 (6.5)
Indications for induction
- Past delivery date, n (%) 36 (50.7) 25 (86.2)
- Pregnancy-induced hypertension, n (%) 6 (8.5) None
- Gestational diabetes mellitus, n (%) 29 (40.8) 4 (13.8)
Bishop score: median (IQR) 5 (3–6) 5 (4–7)
Cervical length in cm: mean (SD) 3.6 (0.7) 3.5 (0.9)
Cervical volume in cm3: mean (SD) 28.6 (11.3) 24.8 (7.6)
  1. SD Standard deviation, IQR Interquartile range
  2. *p-value < 0.05