Table 2 Characteristics of secundiparas undergoing TOLAC following a failed-VE, stratified by a successful VBAC

Factors at P1 (CD due to failed VE)

 gestation at delivery (mean ± std)

40 ± 1.3

40 ± 1.7

 indication for VE prolonged 2^nd stage N (%)

21 (55%)

11 (58%)

 persistent occiput posterior N (%)

6 (16%)

2 (10%)

 birthweight of new-born (mean ± std)

3429 g ± 340 g

3320 g ± 407 g

 macrosomia (> 4000 g) N (%)

4 (7%)

0 (0%)

 delivered elsewhere N (%)

25 (40%)

7 (26%)

Factors at P2 (TOLAC)

 maternal age (mean ± std)

27.4 ± 3.9

27.3 ± 3.5

 artificial reproductive treatment N (%)

0

0

 interpregnancy interval (months) (mean ± std)

27.6 ± 9.1

32.3 ± 12.3

 gestational hypertension

0

0

 gestational diabetes N (%)

1 (1.6%)

2 (7.4%)

 gestation at delivery (mean ± std)

39 ± 1.4

38 ± 2.7

 preterm delivery < 37 weeks N (%)

2 (3.2%)

3 (11.1%)

 induction of labour N (%)

4 (6.5%)

1 (3.7)

 augmentation with oxytocin N (%)

42 (68%)

16 (59%)

 thick meconium N (%)

5 (8.2%)

0 (0%)

 new-born—male N (%)

27 (44%)

17 (63%)

 persistent occiput posterior N (%)

1 (1.6%)

2 (7.4%)

 macrosomia (> 4000 g)

2 (3.2%)

2 (7.4%)

 birthweight of new-born (mean ± std)

3247 g ± 352 g

3421 g ± 650 g

 delta birthweight of new-born (mean ± std)

-195 g ± 396 g

197 g ± 454 g

 delta birthweight of new-born > 500 g (P2 > P1)

3 (5%)

9 (35%)

 delta birthweight of new-born > 400 g (P2 > P1)

3 (5%)

10 (39%)

 delta birthweight of new-born > 300 g (P2 > P1)

7 (12%)

10 (39%)

 delta birthweight of new-born > 500 g (P1 > P2)

16 (27.6%)

2 (7.7%)

 delta birthweight of new-born > 400 g (P1 > P2)

21 (36.2%)

3 (11.5%)

 delta birthweight of new-born > 300 g (P1 > P2)

24 (41.4%)

4 (15.4%)

 head circumference cm (mean ± std)^a

35.0 ± 1.3

34.4 ± 2.6

 delta circumference mm P1 minus P2 (mean ± std) ^a

3.4 ± 19.5

-2.9 ± 14.8

 head circumference P2 > P1 by at least 10 mm

10 (28.6%)

8 (44.4%)