Table 2 Outcome parameters comparing uncomplicated and difficult fetal extraction

obstetrical

operation time (in min)

32.2 ± 11.1

42.2 ± 17.7

< 0.001*

incision-delivery time (in min)

4.6 ± 2.0

6.9 ± 2.9

< 0.001*

uterotomy-delivery time (in min)

1.3 ± 0.8

2.8 ± 1.5

< 0.001*

additional instrumental delivery

3 (0.6)

7 (5.1%)

0.003*

maternal

blood loss (in ml)

556 ± 229.9

652.2 ± 322.9

< 0.001*

delta haemoglobin pre−/postpartum

(in g/l)

21.4 ± 11.6

25.8 ± 12.2

< 0.001*

extensions of the uterine incision

68 (13.8)

34 (24.8)

0.004*

T-incisions

0

7 (5.1)

< 0.001*

neonatal

umbilical arterial pH < 7.15

10 (2.0)

12 (8.8)

< 0.001*

Apgar score at five minutes < 7

5 (1.0)

3 (2.2)

0.381

admissions to the neonatal unit

1 (0.2)

3 (2.2)

0.01

death

0

1 (0.7)

0.22