Table 1 Baseline characteristics

Mean age (range)

40.6 (26–50)

42 (32–49)

Parity median (range)

2 (0–6)

2 (1–10)

Caesarean sections (%)*

7 (35%)

3 (17%)

BMI (SD)

31.4 (6.5)

30 (6.8)

Cycle phase

 • Proliferative

7 (35%)

9 (50%)

 • Secretory

6 (30%)

7 (39%)

 • Menstrual

2 (10%)

2 (11%)

 • Atrophic

1 (5%)

 • Not recorded

4 (20%)

Uterine axis

 • Anteverted

16 (80%)

14 (78%)

 • Retroverted

4 (20%)

4 (22%)

Uterine sound length (SD)

9.35 (1.8)

9.06 (1.1)

Uterine cavity length (sound-endocervical canal [range])

5.45 (4–7)

5.11 (4–6)

Uterine width—cornu to cornu median (range)

4.35 (2.8–5.3)

4.45 (3.5–4.9)